Best Buy Mystery Cache

When you go to the store, how do you find the best buy?

Use the unit prices to pick the best buy. The best buy unit price's first three digits will give you the decimal part of the coordinates that you need to find this cache.

Use the price per ounce of the best buy to get the latitude's decimal digits: a 9-ounce package of chocolates for $6.72 or a one-pound package for $11.10?

Use the price per fluid ounce of the best buy to get the longitude's decimal digits: one cup of juice concentrate for $4.49 or one quart for $17.54?

Can you pick the best buy?

NOTE: This puzzle was changed slightly on 6/21/08. If you solved it before that date, you should solve it again before looking for the cache!