I'm trying to setup a function that will check to see if multiple criteria is
met given three different cells. To be more clear.

I have three columns A, B, C and three different criteria.
If a cell in column A=100, and Column B=95, and Column C=90 then the
response is Platinum.
but
If the cell in Column A=100, and Column B=92 but below 95, and Column C=85
but below 90 then the response is Gold.

Can someone provide some help with this one?

Thanks