How Much more (or less) output will the average American have next year if the $18 trillion GDP grows (or controls) by:

How Much more (or less) output will the average American have next year if the $18 trillion GDP grows (or controls) by:

Assume population of 320 million if the economy contracts, be sure to put a(-) sign in front of your answer a. 2 percent, b.5 percent c. -1 percent.

I worked this problem over and over and I got part A. right which is $1,125.00, but when I do part b&c and enter it into the answer place it marks it wrong, and I did it the same way as part a. This is part b 18 trillion*5 percent/320 million=0.0028125=$2813 is this not the correct way or what? thanks