A company is trying to decide which product to manufacture. The following information is available: Costs Product A Product B Direct Materials 1 $4.50 per unit $5.00 per unit Direct Materials 2 $1.75 per unit $2.50 per unit Direct Materials 3 $3.75 per unit $2.75 per unit Direct Labor $1.10 per unit $1.10 per unit Which product cost is irrelevant to the decision?