The selling price is
The clothing store is buying a jacket at a cost of $150.00 from the manufacturer. When asked to find the selling price, you're trying to find the price that the store sells the product for on shelves.
Since you're provided with a mark up of 25%, you can write an equation to determine how much the shelf-price will be. This is can be written as "25% of the jacket plus the jacket's price equals s, the shelf-price."
Remembering to shift the decimal of the percent, we are given the following formula to solve:
Remember that when dealing with money, you always want to include the currency symbol ($) and to expand/contract the decimal place to meet two place values.