In the simple make-or-buy decision in Exhibit 12-6, we assumed that the capacity currently used to make DVD players will remain idle if Soho purchases DVDs from Broadfield. Often, however, the released capacity can be used for other, profitable purposes. In this case, Soho’s managers must choose whether to make or buy based on how best to use available production capacity.
Exhibit 12-7, Panel A, summarizes the “total-alternatives” approach, the future costs and revenues for all products. Soho’s managers will choose alternative 2, buy DVD players for its 2-in-1 system and use the available capacity to make and sell Digiteks. The future incremental costs of buying DVD players for its 2-in-1 system from an outside supplier ($16,000,000) exceed the future incremental costs of making 2-in-1 system DVD players in-house ($15,000,000). But Soho can use the capacity freed up by buying DVD players for its 2-in-1 system to gain $2,500,000 in operating income (incremental future revenues of $8,000,000 minus total incremental future costs of $5,500,000) by making and selling Digiteks. The net relevant costs of buying 2-in-1 system DVD players and making and selling Digiteks are

The details of the two approaches and the related alternatives listed in the table are as follows:
Relevant Item: PANEL A Total-Alternatives Approach to Make-or-Buy Decisions
1. Alternatives for Soho: Make video-system DVD players and do not make Digiteks
• Total incremental future costs of making/buying video-system DVD players: $15,000,000
• Deduct excess of future revenues over future costs from Digiteks: $0
• Total relevant costs under total-alternatives approach: $15,000,000
2. Alternatives for Soho: Buy video-system DVD players and make Digiteks
• Total incremental future costs of making/buying video-system DVD players: $16,000,000
• Deduct excess of future revenues over future costs from Digiteks: $2,500,000 within parentheses
• Total relevant costs under total-alternatives approach: $13,500,000
Relevant Item: PANEL B Opportunity-Cost Approach to Make-or-Buy Decisions
1. Alternatives for Soho: Make video-system DVD players
• Total incremental future costs of making/buying video-system DVD players: $15,000,000
• Opportunity cost: Profit contribution forgone because capacity will not be used to make Digiteks, the next-best alternative: $2,500,000
• Total relevant costs under opportunity-cost approach: $17,500,000
2. Alternatives for Soho: Buy video-system DVD players
• Total incremental future costs of making/buying video-system DVD players: $16,000,000
• Opportunity cost: Profit contribution forgone because capacity will not be used to make Digiteks, the next-best alternative: $0
• Total relevant costs under opportunity-cost approach: $16,000,000