Turnover is calculated by multiplying the sales price of a product by the number of units sold. For example, if a company sells 10 computers per week at £800 each, their weekly turnover is £8,000. Their annual turnover would be £8,000 x 52 weeks, which is £41,600. Profit is calculated by taking a company's turnover and subtracting all costs from it. Higher profits allow companies to expand more easily. Companies that make consistent losses will eventually go out of business.