The marketing department of a company has designed three different packing boxes for its product. It wants to determine which box will produce the largest amount of sales. Each box will be test-marketed in five different stores for a period of a month. Below you are given the information on sales (in dollars).

Store 1 Store 2 Store 3 Store 4 Store 5 Box 1 210 230 190 180 190 Box 2 195 170 200 190 193 Box 3 295 275 290 275 265