Calculate A Nested IF Function In Speadsheet

I'm writing a spreadsheet where I need to calculate a nested IF function (I think), and I am unsure of how to do it.

The problem is this:
The total $ value of the quote is entered, then depending on two variables, a rebate may be deducted from this total value. The first variable is eligibility (a Y/N response), the second is the type of project - there are two types of project and each attract a different rebate amount.

So I have:

A: total quote $
B: Eligibility - 'Y' or 'N' (if 'Y', then value of 'C' is deducted from 'A'), (if 'N', then no value is deducted from 'A')
C: Type - '1' or '2' (if '1', then 'C' = $1000), (if '2', then 'C' = $1600)
D: final result