Answer:
The answer is 18 months.
Explanation:
Today Jan put a necklace on layaway by making a down payment of $75 and agreeing to pay $15 per month, starting next month, for 18 months.
So, she will receive the necklace in 18 months.
Layaway is a system of paying a deposit for your product to secure it for later purchase. When all your payments are done, the product is given to you.