Formulas frequently appear in the business world. For example, the cost, $C,$ of an item (the price paid by a retailer) plus the markup, $M,$ on that item (the retailer's profit) equals the selling price, $S,$ of the item. The formula is
Use the formula.
The selling price of a computer is $\$ 1850 .$ If the markup on the computer is $\$ 150,$ find the cost to the retailer for the computer.