Answer:
1200 ounces
Step-by-step explanation:
Given that 1 can of paint contains 60 ounces, then, Mr Gerardo buys total number of 20 cans of paint = 20 × 60 = 1200 ounces.
Strategy: Multiply the total number paints bought by the mass of each of them to get the total number of ounces of the paints bought.