Alternate highlighting of duplicate values

I'm making a workbook to keep track of inventory on FIFO basis, as such all deliveries are sorted into "lots" so that we can make sure the first lot to arrive is the first to leave. collum A has duplicates of almost every lot (as quantities sent for a product are almost always less that quantities recieved)

basically collum A is as roughly as follows

02-01
02-01
02-01
01-03
01-03
01-02
01-02
01-02
01-01

I want to alternately shade entire row where duplicate value is found in cell

02-01
02-01
02-01
01-03
01-03
01-02
01-02
01-01

Thanks!