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Stephanie finances $423,000 with a 20/5 balloon mortgage at 4.45%. How much will she pay for principal and interest over the life of the loan? Can someone show me how to solve the answer?

A. $508,077.56
B. $509,378.67
C. $510,674.71
D. $505,422.01

Respuesta :

it is b.509,378.67
just add then multiply 

The answer is C I think 
Hope this helps :)