please help me out

A company must decide between scrapping or reworking units that do not pass inspection. The company has 13.000 defective units that cost $6.00 per unit to manufacture. The units can be sold as is for $3.20 each, or they can be reworked for $4.60 eoch and then sold for the full price of $9.20 each. If the units are sold as is, the company will be able to bulld 13,000 replacement units at a cost of 56.00 esch, and sell them at the full price of 59.20 each. What is the incremental income from selling the units as scrap and reworking and selling the units? Should the company sell the units as scrap or rework them? (Enter costs and losses as negative values.)