Page 129 Critical thinking
A: Dave's economics of one unit of sale is $5

B: The total fixed cost per month is $6,250

C: His total fixed cost is $75,000

D: His daily gross profit is $15

Page 129 Key concepts

The purpose of depreciation is the amount of value of an assest subtracted each year until the asset value becomes zero.
If you were to depreciate a used car that you bought for $4,000 you would have to save $1,000 dollars a year for 4 years in order to replace it.