Find the simple interest on a $400 investment made for 5 years at an interest rate of 7%/year. What is the accumulated amount?
A) The simple interest is $140, the accumulated amount is $540.
B) The simple interest is $115, the accumulated amount is $515.
C) The simple interest is $120, the accumulated amount is $520.
D) The simple interest is $125, the accumulated amount is $555.