Make-or buy and relevant costs - The assembly division of Davenport, Inc., is bidding on an order of 50,000 smart phones. The division is eager to get this order because it has a substantial amount of unused plant capacity. The variable cost for each smart phone if $140 in addition to the cost of the display and touchscreen component. The divisional purchasing manager has received two bids for the component. One is from Davenport's electronics division. This bid if for $35 per unit, although its variable cost if only $30 per unit. The other is from an outside vendor for $34 per unit. Davenport's electronics division has sufficient unused capacity for this order.

a) Determine the relevant costs for this order for the assembly division under both internal and outsourcing arrangements.

b) Determine the relevant costs for this order for Davenport as a company under each of the sourcing arrangements.