Greg need help with assignment

(Hi) Hi! My name is Greg and I really need some help on this assignment

1. Determine the extension amount of the following order:

Product X: 10 units @ $2.35 each

Product Y: 12 boxes @ $6.15 per box

Product Z: 3 dozen @ $12.20 per dozen

here is my answer:

Product X= $23.50

Product Y= $73.80

Product Z= $36.60

**2.** A trader buys 3 dozen units of product X for a total of $158.40. What is the unit cost?

Unit cost= 3 x 12= 36

$158.40/36= $4.40

**3.** A trader can purchase a good at $7.20 per unit, or they can buy 5 for $33.00. What is the total amount saved by buying in bulk? I don't understand this question

**4.** A merchant pays $4,320 for a shipment of goods after receiving a 10% trade discount. What is the list price for the shipment?

trade discount amt = $4,320/.10= $43,200

5. A wholesaler lists a refrigerator model at a price of $850 and offers a chain discount of 20% and 10%. What is the net price?

Net Price

100%-(20 +10)=100-30=70

850 x .70= $595