So this is what i am confused on:

Product S	Product T
Testing	27600/4000*3200 = 22080	5520
Computing	41400/6900*4830 = 28980	12420
Developer	15*20 = 300	15*80 = 1200
Total Cost	51360	19140

How do I get the 22080 and 28980?

When I breakdown the computation I multiplied 6900X4830; and divide 41400 into the answer 6900x4830

When I subtract the computation in second column with

the 41400l I get the 28980

I have to past this class; and, I'm just not getting it. As you may know this is not my favorite class:(

Tetstin