Answer:
If Blue ridge decides to purchase the parts instead of manufacturing them, their total costs will increase by $21,300
Step-by-step explanation:
currently Blue Ridge's costs are:
variable costs = $69,000
fixed costs = $69,000
total $138,000
total cost per unit = $138,000 / 45,000 units = $3.0667 per unit
if Blue Ridge decide to outsource the production of the parts:
variable costs = 45,000 x $4 = $180,000
decrease in fixed costs = $69,000 x -30% = -$20,700
total costs = $159,300
If Blue ridge decides to purchase the parts instead of manufacturing them, their total costs will increase by ⇒ $159,300 - $138,000 = $21,300