A firm currently makes a component, and requires 30 000 of them for the coming year's production. Another supplier has offered the part at a delivered price of $3 per unit. It would cost $3000 to check purchased units for quality. Product costs per unit for the past year were $2.35 variable and $1 fixed based on 30 000 units. If the component was bought, fixed overhead would be reduced by $6000, the cost of leasing specialised equipment. The space vacated by the equipment can be rented for $4000 for the year. a) The buy option costs $12 500 more than the make option. b) At what level of units of production is the firm indifferent between making and buying? 10769 units

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