Final answer:
To find the cost for 1.5 kg of apples and 4.5 kg of oranges, multiply the weight of each fruit by their respective prices.
Step-by-step explanation:
To determine the cost of 1.5 kg of apples and 4.5 kg of oranges, we need to multiply the weight of each fruit by their respective prices. The price of apples is $2.5/kg, so 1.5 kg of apples would cost 1.5 * $2.5 = $3.75. The price of oranges is $3.2/kg, so 4.5 kg of oranges would cost 4.5 * $3.2 = $14.40.