A commodity is priced at 20% profit, and then sold at 20% discount, resulting in a loss of 64 yuan. How much is the cost of this commodity?

A commodity is priced at 20% profit, and then sold at 20% discount, resulting in a loss of 64 yuan. How much is the cost of this commodity?

Suppose the cost of this commodity is x yuan, then the price is (1 + 20%) x = 1.2x yuan, and the selling price is 80% × (1.2x) = 0.96x yuan