Question 4

Explanation

We need to determine the minimum down payment amount that allows Jeje to get the lowest interest rate.

Interest Rate Analysis

The initial interest rate is $6\%$ per year with a minimum down payment of $10\%$. Each subsequent multiple of the minimum down payment (i.e., multiples of $10\%$) will provide an interest reduction of $1\%$ per year, with a maximum reduction of $2\%$.

• 10% Down Payment: Interest $6\%$ (base).
• 20% Down Payment: Interest $6\% - 1\% = 5\%$.
• 30% Down Payment: Interest $6\% - 2\% = 4\%$.
• 40% Down Payment and above: Interest remains $4\%$ (since the maximum reduction is $2\%$).

Thus, to get the lowest interest rate ($4\%$), Jeje must pay a minimum down payment of $30\%$.

Calculating Down Payment Amount

The price of the laptop is $\text{Rp}12,000,000.00$. We calculate $30\%$ of that price:

So, the down payment Jeje has to pay is $\text{Rp}3,600,000.00$.