I have what seems like a simple problem to solve, but I can not seem to
figure it out.

Imagine the following:

Cost of Widget is based on three variables: A, B, C.

So, if I enter a value for A, B and C, then the cost is calculated based on
these inputs (several steps of calculations and iterations, etc.).

I want to put a spreadsheet together that lists a range of values of A and B
with a constant value of C, where each cell would contain the cost those
inputs.

i.e.
Cell B1=10
Cell B2=20
Cell B3=30

Cell B5=20*B1
Cell B6=B5*B2
Cell B7=B3*B6+B5

Cell B9=sum(B5:B7) COST OF WIDGET

Thus, B9 is a function of B1, B2 and B3.

So, if i have a table where the column headings are a range of values for B1
and the row headings are a range of values for B2, and I fix B3 for each
table, then each cell within the table would report a cost depending what
value of B1 and B2 are used.

I hope this makes sense to someone out there. I need help and I don't know
how to do this. I need to provide a supplier or ours a price sheet. I don't
want to reveal how i calculate the costs, i just want to give him a
spreadsheet with the costs and nothing more. This is the reason for my
question.

Thank you.