Example A1 is number of pieces, F4 is total.
I have all the formulas figuared out but this one:

A1= # 0f pieces B1is width C1is height D1is the answer/144 witch gives me
the sq ft
e1 is cost pr sq ft f1 adds tax g1 gives total $ amount

Better example: I can e-mail you what I have if needed to assist.
I need this verry quickly, so please hels ASAP
Thanks
Mike
Sorry for post several times