1.Julie makes and sells shirts for children and adults. She sells the shirts for $20 per unit. Material for the shirts cost $6 each. She has fixed costs per month of $420 and estimates that she can make and sell 80 shirts each month. How many shirts does Julie need to sell to break even?

2.John and his friends have set up a basketball tournament. He can rent a basketball field for a daily charge of $210 and equipment for $160 per day. If he hires independent umpires, he will need to pay $260 for the day. He would arrange caps for each player at the cost of $4 each. If John can get 90 people to participate, what would he have to charge each of them to recover the cost?

3.An invoice was received for $5100 dated June 21 with terms 2/10, n/30.

a.What is the last day for taking the cash discount?

b.What is the amount due if the invoice is paid on the last day for taking the discount?

4.A Company received an invoice for $2000 dated January 22 with terms 3/15,1/30,n/60.

a.If the invoice is paid on January 31, how much is to be paid?

b.If the invoice is paid on February 20, how much is to be paid?

5. Pest control services sells insect killing equipment for $40. The shop's cost is $20, and the operating expenses are 20% of the regular selling price. How much profit will the shop make on each sale?