Confusion

Please can you explain what does it mean
Product X$ per unit Y $ per unit Z $ per unit
Direct materials 25 28 22
Direct labour ($12 per hour) 30 36 24
According to my understanding it should be that X uses $25 per unit of material and $30 is paid for labour per unit so what is $ 12 per hour .

I guess that’s a bit silly question but i am stuck in to it.
Kindly help me in to this.

Thanks in advance.