Compare the alternatives C and D on the basis of a present worth analysis using an interest rate of 10% per year and a study period of 10 years.

Alternative	C	D
First Cost	$-40,000	$-31,000
AOC, per Year	$-12,000	$-6,500
Annual Increase in Operating Cost, per Year	$-1,000	$-1,200
Salvage Value	$9,000	$1,000
Life, Years	10	5

The present worth of alternative C is $ and that of alternative D is $ .