hi,

I am designing a calculation program. It has 2 tables, calc_header, calc_part
The calc_header has many parts. and the product_price
The calc_part has a sales price.

for creating a product_price, I just calculate all the calc_part!sales price.
Know the I have a sales price. This is different than the sum of
calc_part!sales price

If put it in the product_price, the sum isn't correct.

How can I calcuclate all the different calc_part!sales price? so it works at
two sides.