500
there are 75 combinations
What is Upendra is deciding what to wear to school. He has a yellow shirt, a red shirt, and a purple shirt, and he has blue, beige, white, gray, and black pants. He also has boots, high tops, skate shoes, running shoes, and sandals. If he can wear any color shirt with any pair of pants and any pair of shoes, how many different combinations can Upendra pick?