Answer:
The cost of a necklace is $1,600
Step-by-step explanation:
Price of one necklace is the same as the price of five rings, this means
1 necklace = five rings
Price of a necklace = 5 x price of ring
Price of ring = $320
Price of a necklace = 5 x $320
= $1,600
Therefore, a necklace costs $1,600