Sumerian price in silver = [/ liters 300.]
  Sumerian price in liters grain = [* silver 300.] 
  # 1 silver piece = 1 gur = 300 liters of grain
  liters = [* volume_in_cubic_cm .001]
  price? = raw materials + labor  +  profit
  price? = raw materials + heat process
  price? = raw materials + labor 
  average price per unit  = revenue  / units sold

        # pretty print from autoindent and ased editor
        # Sumerian time & accounting calculator
        # written on Windows XP on eTCL
        # working under TCL version 8.5.6 and eTCL 1.0.1
        # gold on TCL WIKI, 15sep2014
        package require Tk
        namespace path {::tcl::mathop ::tcl::mathfunc}
        frame .frame -relief flat -bg aquamarine4
        pack .frame -side top -fill y -anchor center
        set names {{} {men (guru):} }
        lappend names {women  (geme):}
        lappend names {children working (dumu): }
        lappend names {old (sugi) or disabled:}
        lappend names {accounting period days (typical 30 days) :}
        lappend names {workdays on books : }
        lappend names {grain rations (liters) : }
        lappend names {value in silver :}
        foreach i {1 2 3 4 5 6 7 8} {
            label .frame.label$i -text [lindex $names $i] -anchor e
            entry .frame.entry$i -width 35 -textvariable side$i
            grid .frame.label$i .frame.entry$i -sticky ew -pady 2 -padx 1 }
        proc about {} {
            set msg "Calculator for Sumerian Time
            & Accounting from TCL WIKI,
            written on eTCL "
            tk_messageBox -title "About" -message $msg }       
       proc calculate {     } {
            global answer2
            global side1 side2 side3 side4 side5
            global side6 side7 side8 
            global testcase_number
            incr testcase_number 
            set side1 [* $side1 1. ]
            set side2 [* $side2 1. ]
            set side3 [* $side3 1. ]
            set side4 [* $side4 1. ]
            set side5 [* $side5 1. ]
            set total1 [* $side1 $side5 1. ] 
            set total1 [+ $total1 [* $side2 $side5 1.] ]
            set total1 [+ $total1 [* $side3 $side5 .3] ]
            set total1 [+ $total1 [* $side4 $side5 .5] ]
            set side6 $total1  
            set side7 [* $side6 2. ]
            set side8 [* $side7  [/ 1. 300.]  ]  }
        proc fillup {aa bb cc dd ee ff gg hh} {
            .frame.entry1 insert 0 "$aa"
            .frame.entry2 insert 0 "$bb"
            .frame.entry3 insert 0 "$cc"
            .frame.entry4 insert 0 "$dd"
            .frame.entry5 insert 0 "$ee"
            .frame.entry6 insert 0 "$ff" 
            .frame.entry7 insert 0 "$gg"
            .frame.entry8 insert 0 "$hh" 
             }
        proc clearx {} {
            foreach i {1 2 3 4 5 6 7 8 } {
                .frame.entry$i delete 0 end } }
        proc reportx {} {
            global side1 side2 side3 side4 side5
            global side6 side7 side8 
            global testcase_number
            console show;
            puts "%|table $testcase_number|printed in| tcl wiki format|% "
            puts "&| quantity| value| comment, if any|& "
            puts "&| testcase number:| | $testcase_number|&"
            puts "&| $side1 :|men (guru)| $side1 |&"
            puts "&| $side2 :|women (geme)| $side2|& "
            puts "&| $side3 :|working children (dumu)|$side3|& "
            puts "&| $side4 :| old workers (sugi) |$side4 |&"
            puts "&| $side5  :| days time period|$side5 |&"
            puts "&| $side6  :| workdays on books|$side6 |&"
            puts "&| $side7  :| rations (liters) |$side7 |&"
            puts "&| $side8  :| silver pieces|$side8 |&"
         }
        frame .buttons -bg aquamarine4
        ::ttk::button .calculator -text "Solve" -command { calculate   }
        ::ttk::button .test2 -text "Testcase1" -command {clearx;fillup 3.5 0.0 0.0 0.0  30. 105.0 210.0 0.7}
        ::ttk::button .test3 -text "Testcase2" -command {clearx;fillup 0.0 10.0 0.0 0.0  30. 300. 600. 2. }
        ::ttk::button .test4 -text "Testcase3" -command {clearx;fillup 0.00 0.0 5.0 0.0  30.0 45.0 90.00 0.3 }
        ::ttk::button .clearallx -text clear -command {clearx }
        ::ttk::button .about -text about -command about
        ::ttk::button .cons -text report -command { reportx }
        ::ttk::button .exit -text exit -command {exit}
        pack .calculator  -in .buttons -side top -padx 10 -pady 5
        pack  .clearallx .cons .about .exit .test4 .test3 .test2   -side bottom -in .buttons
        grid .frame .buttons -sticky ns -pady {0 10}
        . configure -background aquamarine4 -highlightcolor brown -relief raised -border 30
        wm title . "Sumerian Time & Accounting  Calculator "

  puts " %| testcase $testcase_number | value| units |comment |%"
  puts " &| volume| $volume| cubic meters |based on length $side1 and width $side2   |&"