The Silverfox Co. produces 1,000 parts per year which are used in the assembly of a toy car the company manufactures. The unit product cost of the part is $21 based on: The part can now be purchased from an outside supplier for $20 per part. If the part is purchased from an outside supplier, 2/3 of the fixed manufacturing cost can be eliminated. If the part is purchased from an outside supplier, what will be the annual impact on the company's net operating income? a) $2,000 decrease in net operating income. b) $5,000 increase in net operating income. c) $1,000 decrease in net operating income. d) $1,000 increase in net operating income