Alice is planning to open up a sandwich shop. An estimate of her costs/revenues are as follows: average sales price per sandwich: $12.75; yearly rent: $24,000; monthly fixed utility bill: $800; average cost of ingredients per sandwich: $6.55; monthly labour bill (fixed): $10,500; miscellaneous fixed supplies/month: $100; misc. variable supplies: $1.45 per sandwich. How many sandwiches does she need to sell per month to make an operating

income of $139,940 per year?

2,138 units 2,082 units

5,276 units

8,640 units