"IF" Functionality Inquiry

So I am trying to figure out how to whenever it's a "Y" and "INCOMING", then it will equal a dollar amount.

So as if a + b = 1 then equals $35

=COUNTIFS(F3:F100,"Y",B3:B100, "INCOMING")

I did it a simple way and just had whatever number it comes up with multiplied it by 35 in another column. This works for me, but if there is another formula that would be awesome to know

Then how would I figure out how to do a similar formula, but add everything BUT "INCOMING" in the B column.

So if a + b (which excludes "INCOMING") = 1 then equals $25

Also when a certain number is reached it will add a number.

x = 15, 20, 25, 30, 35, 40 then add $100

Whatever formula this will be is there a way to have it add another $100 whenever it hits the next increment of 5, but only up until 40?

Thank you in advance!