Based on the following MCC and Investment Opportunity Schedule (IOS), what is the optimal capital budget?

MCC Schedule

From 0 to $10,000 14%

From 10,001 to $20,000 14.5%

From 20,001 to $25,000 15%

From 25,001 to $30,000 15.5%

$30,001 and above 16%

IOS

Projects Costs IRR

A $5,000 14.8%

B $5,000 14.3%

C $5,000 16.8%

D $10,000 15.3%

E $10,000 15.8%