So A lady walks into the bank I work at and she comes up to the counter and asks me to check her balance so I check her balance.........I push her over ;)
Ok. First you have to find the unit rate. Since you can buy 9 packages of grapes for $24, then you can get 1 grape package for $2.6667. If you have $8, you can buy 3 packages of grapes.
50x30=1500 (this is an approximated rounded answer)