Hide / Unhide Row on a Sheet based on the Value of a Cell on Another Sheet

I am looking to create an input sheet that will transform to an invoice and where there is no value on certain line items, those rows on the invoice should be hidden.

Example

Ref Sheet

Item A (Cell B12) = 0
Item B (Cell B13) = 0
Item C (Cell B14) = 1

Invoice Sheet

Row 12 - Hidden
Row 13 - Hidden
Row 14 - Show

I have attempted to build the macro for the sheet so that it changes automatically as the information is inputted, but the row never hides. Any help is appreciated.