White paint cost $2.80 per liter. Blue paint costs $3.50 per liter. White paint and blue paint are mixed in the ratio 3:2. Work out the cost of 18 liters of the mixture.
You'll need 10.81 of white paint, and 7.21 of blue paint.
10.21*2.80=30.24
7.21*3.50=25.20
Answer:$55.44
