It's already been answwered.
http://www.jiskha.com/display.cgi?id=1410393314
It costs a manufacturer $7.95 to produce sunglasses that sell for $21.99. How many pairs of sunglasses must the manufacturer sell to make a profit of $10,530?
1 pairs of sunglasses
2 answers
If you scroll down the page to first question highlighted, you will see it