diff --git a/src/Makefile b/src/Makefile
index 8707242..cd59f87 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -43,7 +43,7 @@ HACKERBASE-DEPS=hackerbase.scm cal-month.import.scm			\
 	progress.import.scm cal-period.import.scm			\
 	util-stdout.import.scm export-web-static.import.scm		\
 	dokuwiki.import.scm mailinglist.import.scm			\
-	export-sheet.import.scm
+	export-sheet.import.scm mbase-query.import.scm
 
 HACKERBASE-OBJS=hackerbase.o testing.o listing.o cal-month.o		\
 	 cal-period.o ansi.o util-bst-ldict.o command-line.o mbase.o	\
@@ -61,7 +61,7 @@ HACKERBASE-OBJS=hackerbase.o testing.o listing.o cal-month.o		\
 	 util-dir.o dokuwiki.o racket-kwargs.o duck.o util-bst.o	\
 	 util-bst-bdict.o util-bst-ldict.o util-bst-lset.o mailman2.o	\
 	 mailman-common.o mailman3.o mailman3-sql.o tiocgwinsz.o	\
-	 mailinglist.o export-sheet.o
+	 mailinglist.o export-sheet.o mbase-query.o
 
 GENDOC-SOURCES=gendoc.scm duck-extract.import.scm			\
 	util-time.import.scm util-csv.import.scm util-git.import.scm	\
@@ -569,3 +569,10 @@ EXPORT-SHEET-SOURCES=export-sheet.scm mbase.import.scm		\
 
 export-sheet.o: export-sheet.import.scm
 export-sheet.import.scm: $(EXPORT-SHEET-SOURCES)
+
+MBASE-QUERY-SOURCES=mbase-query.scm mbase.import.scm			\
+	brmember.import.scm util-bst-ldict.scm primes.import.scm	\
+	cal-period.import.scm cal-month.import.scm
+
+mbase-query.o: mbase-query.import.scm
+mbase-query.import.scm: $(MBASE-QUERY-SOURCES)
diff --git a/src/hackerbase.scm b/src/hackerbase.scm
index 7074d1e..ce6c781 100644
--- a/src/hackerbase.scm
+++ b/src/hackerbase.scm
@@ -52,7 +52,8 @@
 	racket-kwargs
 	util-string
 	mailinglist
-	export-sheet)
+	export-sheet
+	mbase-query)
 
 ;; Command-line options and configurable parameters
 (define -needs-bank- (make-parameter #f))
diff --git a/src/mbase-query.scm b/src/mbase-query.scm
new file mode 100644
index 0000000..c9e3e4c
--- /dev/null
+++ b/src/mbase-query.scm
@@ -0,0 +1,92 @@
+;;
+;; mbase-query.scm
+;;
+;; Queries of various mbase derived attributes.
+;;
+;; ISC License
+;;
+;; Copyright 2023-2025 Brmlab, z.s.
+;; Dominik Pantůček <dominik.pantucek@trustica.cz>
+;;
+;; Permission to use, copy, modify, and/or distribute this software
+;; for any purpose with or without fee is hereby granted, provided
+;; that the above copyright notice and this permission notice appear
+;; in all copies.
+;; 
+;; THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+;; WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+;; WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+;; AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+;; CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+;; OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+;; NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+;; CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+;;
+
+(declare (unit mbase-query))
+
+(module
+    mbase-query
+    (
+     mbase-info
+     mbase-stats
+     )
+
+  (import scheme
+	  (chicken base)
+	  srfi-1
+	  mbase
+	  brmember
+	  util-bst-ldict
+	  primes
+	  cal-period
+	  cal-month)
+
+  (define (members-base-oldest-month mb)
+    (make-cal-month 2015 1))
+
+  ;; Returns dictionary with statistics about the members base.
+  (define (mbase-info mb-arg)
+    (let* ((members (find-members-by-predicate mb-arg brmember-usable?))
+	   (di0 (make-ldict))
+	   (di1 (ldict-set di0 'invalid
+			   (filter (compose not is-4digit-prime? brmember-id) members)))
+	   (di2 (ldict-set di1 'active
+			   (filter brmember-active? members)))
+	   (di3 (ldict-set di2 'suspended
+			   (filter brmember-suspended? members)))
+	   (di4 (ldict-set di3 'students
+			   (filter brmember-student? members)))
+	   (di5 (ldict-set di4 'destroyed
+			   (filter brmember-destroyed? members)))
+	   (di6 (ldict-set di5 'month (*current-month*)))
+	   (di7 (ldict-set di6 'total members))
+	   (di8 (ldict-set di7 'problems
+			   (find-members-by-predicate mb-arg brmember-has-problems?)))
+	   ;; add expected income
+	   ;; add total balance of all members (including destroyed)
+	   ;; add total balance of all active members (-only-active -like)
+	   ;; add average age of active members
+
+	   )
+      di8))
+
+  ;; Returns a list two lists: keys, data.
+  ;; Each data record contains values for all keys.
+  (define (mbase-stats mb)
+    (let ((keys '(month total active suspended students destroyed invalid)))
+      (let mloop ((data '())
+		  (month (members-base-oldest-month mb)))
+	(if (cal-month<=? month (*current-month*))
+	    (let ((bi (with-current-month month
+					  (mbase-info mb))))
+	      (let kloop ((row (list (ldict-ref bi 'month)))
+			  (keys (cdr keys)))
+		(if (null? keys)
+		    (mloop (cons (reverse row) data)
+			   (cal-month-add month 1))
+		    (kloop (cons (length (ldict-ref bi (car keys))) row)
+			   (cdr keys)))))
+	    (list keys (reverse data))))))
+
+  )
diff --git a/src/mbase.scm b/src/mbase.scm
index 3412306..f2f12bb 100644
--- a/src/mbase.scm
+++ b/src/mbase.scm
@@ -50,8 +50,6 @@
   mbase-update-by-id
   mbase-update
 
-  mbase-stats
-
   mbase-add-unpaired
   mbase-unpaired
 
@@ -207,47 +205,6 @@
 				    (proc mr)
 				    mr)))))
 
- ;; Returns dictionary with statistics about the members base.
- (define (mbase-info mb-arg)
-   (let* ((members (find-members-by-predicate mb-arg brmember-usable?))
-	  (di0 (make-ldict))
-	  (di1 (ldict-set di0 'invalid
-			  (filter (compose not is-4digit-prime? brmember-id) members)))
-	  (di2 (ldict-set di1 'active
-			  (filter brmember-active? members)))
-	  (di3 (ldict-set di2 'suspended
-			  (filter brmember-suspended? members)))
-	  (di4 (ldict-set di3 'students
-			  (filter brmember-student? members)))
-	  (di5 (ldict-set di4 'destroyed
-			  (filter brmember-destroyed? members)))
-	  (di6 (ldict-set di5 'month (*current-month*)))
-	  (di7 (ldict-set di6 'total members))
-	  (di8 (ldict-set di7 'problems
-			  (find-members-by-predicate mb-arg brmember-has-problems?))))
-     di8))
-
- (define (members-base-oldest-month mb)
-   (make-cal-month 2015 1))
-
- ;; Returns a list two lists: keys, data.
- ;; Each data record contains values for all keys.
- (define (mbase-stats mb)
-   (let ((keys '(month total active suspended students destroyed invalid)))
-     (let mloop ((data '())
-		 (month (members-base-oldest-month mb)))
-       (if (cal-month<=? month (*current-month*))
-	   (let ((bi (with-current-month month
-					 (mbase-info mb))))
-	     (let kloop ((row (list (ldict-ref bi 'month)))
-			 (keys (cdr keys)))
-	       (if (null? keys)
-		   (mloop (cons (reverse row) data)
-			  (cal-month-add month 1))
-		   (kloop (cons (length (ldict-ref bi (car keys))) row)
-			  (cdr keys)))))
-	   (list keys (reverse data))))))
-
  ;; Adds unpaired transaction to given members-base
  (define (mbase-add-unpaired mb tr)
    (ldict-set mb 'unpaired
diff --git a/src/members-fees.scm b/src/members-fees.scm
index 5a3b0c3..7373497 100644
--- a/src/members-fees.scm
+++ b/src/members-fees.scm
@@ -41,6 +41,7 @@
   member-calendar->table
   members-summary
   member-calendar-entry->fee
+  get-expected-income
   get-expected-income-string
   )
 
@@ -208,6 +209,19 @@
 	    (cons 0 0)
 	    members)))
 
+ (define (get-expected-income mb)
+   (let* ((flst
+	   (map (compose member-calendar-entry->fee make-member-calendar-entry)
+		(find-members-by-predicate mb brmember-active?)))
+	  (amts (sort (delete-duplicates flst) <))
+	  (sums
+	   (map
+	    (lambda (amt)
+	      (cons amt
+		    (length (filter (lambda (v) (= v amt)) flst))))
+	    amts)))
+     (number->string (foldl + 0 (map (lambda (p) (* (car p) (cdr p))) sums)))))
+
  (define (get-expected-income-string mb)
    (let* ((flst
 	   (map (compose member-calendar-entry->fee make-member-calendar-entry)