You Can Sell 60 Pet Chias Per Week If They

Multiple Choice

You can sell 60 pet chias per week if they are marked as $1 each,but only 50 per week if they are marked $2 per chia. Your chia supplier is prepared to sell you 10 chias per week if they are marked $1 per chia, and 20 per week if they are marked $2 per chia. At what price should the chias be marked so that there is neither surplus nor a shortage of chias ?

A) $3.50
B) $3.64
C) $2.25
D) $3.55
E) $4.50