Estimate each sum or difference by replacing each fraction with 0, ½ or 1. Remember to use a number line to help you with this 8/15 + 2/5 = ___ + ___ = and 17/21 - 2/10 = ___ - ___ = i need help asap

The manager at gabriela's furniture store is trying to figure out how much to charge for a book shelf that just arrived. the book shelf was bought at a wholesale price of $ 1 4 7 . 0 0 $147.00, and gabriela's furniture store marks up all furniture by 6 0 % 60%. at what price should the manager sell the book shelf?