At a grocery store, blueberries come packaged in 8-ounce containers for $2.80. at a farmer's market, blueberries cost $4.20 for 14 ounces. there are 16 ounces in one pound. which statement accurately compares the cost of blueberries?

                            Grocery Store:                    Farmer's Market
Cost                        $2.80                                     $4.20
Weight                       8 oz                                       14 oz
Unit Cost
Cost ÷ Weight         $0.35 per oz                         $0.30 per oz
1 lb = 16 oz               16 oz                                      16 oz
Cost per pound       
Unit Cost * 16oz     $5.60 per lb                          $4.80 per lb

The blueberries in the farmer's market costs less than the blueberries from the grocery store. 

One pound of blueberries from the farmer's market is cheaper by $0.80 than the blueberries from the grocery store. ($5.60 - $4.80 = $0.80)

He is right i did this thing before