Pls help with full calculation

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )

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?

If you measured the width of a window in inches and then in feet with measurement would you have the greater number of units