An outside supplier has offered to provide the annual requirement of 10,000 of the parts for only $25 each. The company estimates that 30% of the fixed manufacturing overhead costs above will continue if the parts are purchased from the outside supplier. Assume that direct labour is an avoidable cost in this decision. Based on these data, what will be the per-unit dollar advantage or disadvantage of purchasing the parts from the outside supplier? Multiple Choice $1 per unit disadvantage. $10 per unit advantage. \$4 per unit disadvantage. $3 per unit advantage