Combining MAX, ROUNDUP & IF for the same cell

Hello!
I am trying to create one formula (in one cell) so that it performs the following three things:
1) Rounds any number to the nearest dollar
2) Makes the minimum dollar value $2.00
3) If another cell (G2) reaches $100.00 or more, I want it to revert to another cell's (B2) value.

So, in essence, I want to combine the following two things:

=MAX(2,ROUNDUP(F2,0))
AND
=IF(G2>="100",B2)

I do not know how to correctly order these so that it performs all three things I'm looking for it to do. I've posted this before, but was given an answer that created a circular reference and did not make the minimum value $2.00.
Any help would be appreciated!
Thanks in advance!