i need to know the future worth of each project, A,b and C, 667.9 is wrong

More Info (c) Compute the future worth of each project at the end of six years with variable MARRs as follows: 8% for n=0 to n=3 and 11% for n=4 to n=6. Project A worth at the end of six years will be $ (Round to the nearest cent.)