Bonus Problem 9 (5 points): SoftSeats produces chairs and couches for reception areas and executive suites. Historically, SoftSeats has manufactured their own cushions for the chair they sell. However, a cushion manufacturer has recently approached SoftSeats with an offer to produce their cushions for them for $45 per cushion. SoftSeats incurs the following costs in the production of the seat cushions: $10 for direct materials, $20 for direct labor, $10 for variable overhead, and $10 for fixed overhead. Management is wondering whether they should accept the offer. What would be the increase or decrease in per-unit costs if the cushions were purchased from the outside supplier