i am creating a workbook to track assessment details for my classes. As part
of this workbook i am trying to use a vlookup table to convert an assessment
level to a numerical value e.g. 4B converts to 4.33.

My lookup function works fine apart from any level that has the letter A in
it.

My lookup table is as follows

3 3
4C 4
4B 4.33
4A 4.67
5C 5
5B 5.33
5A 5.67
6C 6
6B 6.33
6A 6.67
7C 7
7B 7.33

4A returns an N/A error
5A returns the value of 4A
6A returns the value of 5A

Please can anyone help me resolve this issue

kind regards

Si