I am creating a chart by zip codes that will give the mileage between
numerous zip codes. Once the data is entered I would like to use one
cell to enter the start zip code and one for the finish zip code and
have the data in the appropriiate cell the result. I have tried array,
logic, and matrix functions but have not been able to come up with the
correct formula.

23320 23321 23322 23323 23324

23320 1 12 14 16 5

23321 12 1 13 15 17

23322 14 13 1 10 12

23323 16 15 10 1 11

23324 5 17 12 11 1

The formulas that I need help with a

Start Zip Code 23321
End Zip Code 23324

Mileage 17

There are 64 zip codes to work with and the only way I know how is to
use logic functions that are limited as to the number of functions
within a single cell or formula or are just too labor intensive adding
all of the functions. I know that I usually end up taking the long way
around but in this case there are too many zones to work with.

Thanks