What you're looking for, I believe. This is 2003 information from my old volunteering place (Legal Resource Office), no idea if it is still accurate.
Total Credits = Credits Discounted
16-17 credits = 1 credit
17.5-19 credits = 2 credits
19.5-21 credits = 3 credits
21.5-23 credits = 4 credits
23.5+ = 5 credits
Credits based on a UofW scale:
0.5 credits (one semester class)
1 credit (one full year class)