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Gelb Company currently makes a key part for its main product. Making this part incurs per unit variable costs of $1,30 for direct. materials and $0.85 for direct labor Incremental overhead to make this part is $1.44 per unit The company can buy the part for $3.76 per unit. (a) Prepare a make or buy analysis of costs for this part. (Enter your answers rounded to 2 decimal places.) (b) Should Gelb make or buy the part