SumIf For Adjacent Column

In the B column i have dates. In the C column i have total hours.

Right now the following code counts how many instances of a date (Dt) are found and makes a decision if it is more than 3.

VB:
IVAL = Application.WorksheetFunction.CountIf(WS.Range("B:B"), Dt)
If IVAL > 3 Then

What i need is to SUM the hours (C column) for each instance of the date (Dt) in the B column, and test if it is greater than 24. so it would be similar to this:

VB:
IVAL = Application.WorksheetFunction.SumIf(WS.Range("C:C"), Dt)
If IVAL > 24 Then

Except that this code attempts to sum the hours of the C column and also wants to recognize the dates from the C column which would not work. I need something different than SUMIF. I need it to Sum the C column for the appropriate dates (Dt) in the B column.