Sumif Formula Assistance need to calculate vacation/illnes hours

I'm trying to complete a spreadsheet to figure out vacation, illness, etc. days.

I have a drop down box with for sunday-saturday:

H
V 4.00
V 4.50
V 8.00
V 9.00
AD 4.50
AD 9.00
I 0.25
I 0.50
I 0.75
I 1.00
I 1.25
I 1.50
I 1.75
I 2.00
I 2.25
I 2.50
I 2.75
I 3.00
I 3.25
I 3.50
I 3.75
I 4.00
I 4.25
I 4.50
I 4.75
I 5.00
I 5.25
I 5.50
I 5.75
I 6.00
I 6.25
I 6.50
I 6.75
I 7.00
I 7.25
I 7.50
I 7.75
I 8.00
I 8.25
I 8.50
I 8.75
I 9.00


I'm trying to return the sum of Illness, vacation, accumulated days for Sunday-Saturday in a individual column. I need the formula to distinguish between I, V, AD etc. can someone please help it will be greatly appreciated.

Thank you,

J