A process heat recovery study identifies five potential modifications, none of which are mutually exclusive, with the costs and energy savings given below.

Project	Capital Cost ($MM)	Fuel Savings (MMBtu/hr)
A	1.6	15
B	0.6	9
C	1.8	16
D	2.2	17
E	0.3	8

If fuel costs $6/MMBtu and the plant operates for 350 days/year: What is the maximum 10-year NPV that can be achieved with a 15% interest rate and a 35% tax rate? Assume all the projects can be built immediately, and use MACRS depreciation with a five-year recovery term. What combination of projects is selected to meet the minimum NPV?