Multiple results in one cell

I need to have one cell that will display multiple results when data is entered.
EX: =IF(A33="gts-320",4.8,0)
I need to add several more to this cell. =IF(A33="gts-320",4.8,0)=IF(A33="gts-520",4.8,0) and so on. The single command works but when I add the next one it will not work.
I am very new to this. Any help would be great. I have 4 total i need this cell to work with.
JC