This is a two stage multi-cache:
This cache is not at the above co-ordinates, here you need to find the numbers on the back of the 30mph sign
Then use the numbers to do these simple sums:
1st number + 2nd number = A
5th number = B
1st number = C
3rd number = D
1st + 2nd + 4th + 5th numbers = E
2nd + 5th number = F
The co-ordinates for the cache (which is not that far away) are: N 50° 59.ABC W 001° 18.DEF