Beta Incorporated can produce a unit of Zed for the following costs: direct materials, $10; direct labor $20; and incremental overhead, $30. An outside supplier offers to provide Beta with all of the Zed units it needs at $58 per unit. Beta Incorporated should: Multiple Choice Make Zed since the relevant cost to make it is $30. Buy Zed since the relevant cost to make it is $30. Buy Zed since the relevant cost to make it is $60. Buy Zed since the relevant cost to make it is $80. Make Zed since the relevant cost to make it is $60.