Can I put a variable row number in an IF function???

I'm creating a costing sheet for cocktails with separate sheets labelled "CALCULATOR" and "Liquor" and I am trying to make the CALCULATOR automatically populate certain information from the Liquor sheet. Here is my problem...

The relevant information on the Liquor sheet is in columns A, the product name, and E, the cost per ounce (E3 = cost per ounce of A3, the same is true for all rows in columns A & E). On the CALCULATOR sheet, I've created a drop-down list of the liquor options (Liquor!A) and I would like the CALCULATOR sheet to automatically populate the cost per ounce section (CALCULATOR!F)when the corresponding alcohol is selected.

On the CALCULATOR sheet, the simple formula that works for a single row is =IF(D6=Liquor!A3,Liquor!E3) but I can't figure out how to make the row number variable or how to make the row number of E dependant upon and matching that of column A.

I hope this explanation is comprehensive enough to understand my problem. Any help would be greatly appreciated. Normally I can find answers on google, but this particular search has repeatedly come up empty.