@wanxin2610,
Direct Materials -- $108,000/12,000 units = $9/unit
Direct Labour -- $120,000/12,000 units = $10/unit
Estimated OH -- $180,000/12,000 units = $15/unit
Estimated cost per unit produced : $9 + $10 + $15 = $34
I'm doing the same quiz and I think this is the answer. Good luck for acc203.