The graphic M-C-M depicts how capitalists preserve and grow their wealth through a cycle of investment and profit production. The capitalist begins by using M (money) to purchase C (commodities), which may include labor, raw materials, and production-related instruments. After then, products or services are made using the commodities. M (more money) is the result of the items being sold for money than the capitalist initially invested after they are made. By reinvesting profit from the sale, the capitalist can continue the cycle and eventually increase their wealth. By paying workers less than the value they produce and keeping the difference as surplus value that is reinvested to increase wealth, capitalists are able to earn profit.