Maria and John decide to shop for furnishings for the new house. They choose items that amount to $5600.00. The store has 2 fixed installment simple interest loan options for purchasing: They decide...

Maria and John decide to shop for furnishings for the new house.  They choose items that amount to $5600.00.  The store has 2
fixed installment simple interest loan
options
for purchasing:

1. They decide to defer any purchases and invest a $5600 bonus that Maria will be getting from work in a savings account. The interest rate is 1.8%
   compounded every month.  How much
   interest
   will they earn in 4 years?  Show work