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Question 5

5

Number 5

Mbox laptop store offers a 20%20\% discount for purchasing series AA laptops. Purchases at the store can be paid in monthly installments (with equal amounts, starting from the second month) with a simple interest of 6%6\% per year. The down payment required is at least 10%10\% of the initial price, and every subsequent minimum multiple will get an interest reduction of 1%1\% per year, up to a maximum of 2%2\% per year.

In celebration of its 22nd anniversary, the store offers an installment plan without a down payment with the lowest installment interest rate. Jojo buys a series AA laptop for Rp15,000,000.00\text{Rp}15,000,000.00 by installments. So that Jojo's monthly installment is not more than Rp600,000.00\text{Rp}600,000.00, Jojo must pay in installments at least ... times.