IF Lookup to Fill Cell With Data from Another Sheet

I'm trying come up with a formula that will look at a cell A in sheet A, reference cell A in sheet B and if they match copy data from cell B on sheet B to cell B on sheet A. I've the formula below in excel to copy of tab to tab and this didn't work with Smarsheet.

=IF([Inventory Number]@row>0,lookup(2,1/{Computer Inventory Range 1},{Computer Inventory Range 2}))


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