In 2018, it cost Alli's Broom's $18 per unit to produce racing broom handles. In 2019, that increased to $21 per unit. Dr.Vee's Broom's said they could make the same racing broom handles for $16 per unit. In a make-or-buy decision, which is true?

Question 9 options:

	Differential costs are $5 per unit
	Net relevant costs are $2 per unit
	Incremental revenues are $3 per unit.
	Incremental costs are $2 per unit