Someone help me with this please

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?