Eyes open 2 student's book стр 37 номер 5

When determining the price of a product, you must take into account all the costs associated with this product. These costs are called the cost of the product and they are recorded in the calculation sheet. In addition, when determining the price of a product, it is necessary to take into account revenue per unit of product. The price of a product is also determined by supply and demand. The company may set a higher or lower price depending on the quantity of the product being sold. Pricing and sales of goods are handled by the commercial and accounting departments. They work with the main documents necessary for determining the price and organizing the sale of goods. The most important of them are an order, a note, a calculation statement, and an invoice