Question 12

Explanation

To determine the selling price of the mixture, we need to know the total capital expenditure and the total weight of the rice obtained. Let's calculate this step-by-step using the concept of weighted average.

The total capital is the sum of the purchase costs for rice type A and type B:

The total weight of the rice after mixing is $20 + 30 = 50$ kg. From this, we can calculate the cost price per kilogram of the mixed rice:

The merchant wants a profit of $10\%$. This means the selling price per kg is the cost price plus the profit, or equivalent to $110\%$ of the cost price.

Thus, the selling price of the mixed rice per kg to achieve a $10\%$ profit is $\text{Rp12,320.00}$.