2 subform bounded at the same table

[Mirna]

Hi
I have a serious probleme : 1 form contains 2 subforms
bounded at the same table.

The table is for choice of product, subform1 allow me to
add only one product of type computers subform2 allow me
to choose more than 1 product of type Hardware when I
choose from the first subForm and after from the 2nd
subform I'm overwriting the first product and I cannot
make total of price

Any help please

Thanks