Since I have 45 lines to put this in (and 21 columns of budget #'s) is there a simpler formula for this?

Budget 300

Amt.... Balance
10.... 290 <-formula in this cell=IF(E13<>"",$F$10-$E$13,"")
10.... 280 <-formula in this cell=IF(E14<>"",$F$10-$E$13-$E$14,"")
10.... 270 <-formula in this cell=IF(E15<>"",$F$10-$E$13-$E$14-$E$15,"")
10.... 260 <-formula in this cell=IF(E16<>"",$F$10-$E$13-$E$14-$E$15-$E$16,"")
10.... 270 <-formula in this cell=IF(E17<>"",$F$10-$E$13-$E$14-$E$15-$E$16-$E$17,"")
10.... 260<-formula in this cell=IF(E18<>"",$F$10-$E$13-$E$14-$E$15-$E$16-$E$17-$E$18,"")
10.... 250<-formula in this cell=IF(E19<>"",$F$10-$E$13-$E$14-$E$15-$E$16-$E$17-$E$18-$E$19,"")
10.... 240<-formula in this cell=IF(E20<>"",$F$10-$E$13-$E$14-$E$15-$E$16-$E$17-$E$18-$E$19-$E$20,"")
10.... 230<-formula in this cell=IF(E21<>"",$F$10-$E$13-$E$14-$E$15-$E$16-$E$17-$E$18-$E$19-$E$20-$E$21,"")

etc, etc, etc

Any help would be most appreciated.
Thanks