Please help me . Please help me

4. Two shops are selling the same piano model for RM10,000 cash. Their instalment plans are as follows Items Shop A Shop B Down payment 10% of the cash price 30% of the cash price Interest charged 11.5% per annum on the 8.5% per annum, using the original balance constant ratio formula Mode of payment Monthly Monthly Period of payment 3 years 3 years Ah Wong wants to buy the piano. He has only RM1,000 to pay the down payment However, the balance of the down payment can be financed from a cooperative which charges 5% compounded monthly and the repayments are to be made monthly for three years a) Find the total payment he has to make, if he buys from: (1) shop A (ii) shop b) If he can only afford to pay RM300 a month, which shop should he choose