show your work please!

A business currently sells mobile phones in the domestic market for $80. The cost of the phones includes $50 variable cost per unit and $20 fixed cost per unit. A bid is received from an overseas customer for 1,000 phones at a price of S60 per phone. An additional 10% export fee on price would be assessed to the mobile phone company for overseas sales. What would be the differential income or loss from accepting the overseas bid? a. $4,000 loss b. $14,000 loss c. $4,000 income d. $10,000 income 13