Answer:
current manufacturing costs for 1,249 units:
an outside vendor offers to supply the parts at $14 per unit
all fixed manufacturing costs are unavoidable.
the net cost to buy if Ayayai is able to lease the manufacturing facilities for $8,085 per year:
net cost to buy without the lease = (purchase price - variable costs) x 1,249 units = ($14 - $9) x 1,249 = $6,245
the net cost to buy with the lease = $6,245 - $8,085 = -$1,840, which means that Ayayai would actually save money by purchasing the parts if it is able to lease the facilities.