Money is earned. Then it is saved or spent on goods and services. What you give up is your opportunity cost. The opportunity cost is the next best thingt. If you choose to play a video game instead of reading, your opportunity cost would be to read a book.
Factories make goods to send to stores to be sold.
The grocery store shelves are filled with jam, cereal, and baby food we need at home. When goods are produced on an assembly line, someone checks for the quality of the product. Most goods go through a quality inspection before being sold in stores. Dolls even get a quality check. Boys and girls use resources like desks, books, globes, and computers at school.