If apples cost $3.50 per kilo, how much would 1 1/2 kilos cost? If nuts cost 9.20 per kilo, how much would 2 1/4 kilos cost?

If milk cost $0.58 per liter how much would 3 1/2 liters cost?

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right