hello! A painting is being sold for 325% of the original cost, 100% of the price is double, 200% of the price is triple, and 300% of the price is 4 times the original price. In this case, we multiply 3,000 by 4.25, because it is a 325% increase. 3,000 * 4.25 is 12,750. There. The retail price of the painting is $12,750.