on *:TEXT:!msavg:*:{ notice $nick %mstotalnum Magic Seeds have been purchased at an average price of %msavgprice each. }

on 100*:TEXT:!ms*:*:{ if ( $3 == $null ) { set %ms1 1 } else { set %ms1 $3 }
  set %ms2 $calc($2*1000)
  set %mstotalnum $eval(%mstotalnum $+ + $+ %ms1)
  set %mstotalspent $eval(%mstotalspent $+ + $+ ($eval(%ms2 $+ * $+ %ms1)))
  set %msavgprice $eval(%mstotalspent $+ / $+ %mstotalnum)
}