Greg need help with math homework

(Happy) Hi! this is Gregory and I need help with my math homework, I already had it figure out, but I need to know if I am on the right track. Thanks

Here are the Question and what I came up with:

**11.** A retailer sells a clothing item for $49.99. If the retailer maintains a 40% markup on cost, how much can it afford to pay for the item?

Cost= Price/1+ markup price

$49.99/1 +.40

=49.99/1.4

=$35.71

**12.** Determine the selling price of a good if it is purchased for $36 and the firm wants to earn a markup of 40% on the selling price.

Selling price= Cost/1- markup rate

$36/1-.40

=$36/.60

=$60

**14.** A retailer wants to sell an item that costs $18 at a list price that will provide a 25% markup on the selling price and give the customer a 40% discount. What is the list price?

Cost + markup= selling price

$18 + .25S=S

$18=S-.25S

$18= -75S

24= S

List Price - Trade discount = Net Price

P - .40P = $24

.60P = $24

P =$ 40