Jasmine works at the Air Canada Centre selling popcorn. She is paid $8 per hour plus $0.25 for every bag of popcorn she sells. Write an equation that models the situation.

Ateacher wanted to buy a chair, a bookshelf, two tables and a desk. she spent $900 for all five items and the chair and the desk combined 70% of her total. if the bookshelf cost $50, how much did each of the tables cost?