Allen is evaluating a business opportunity to sell premium car wax at vintage car shows, The wax is sold in 64 ounce tubs. Allen can buy the wax for $30 per tub. He plans to sell each tub for $50. He estimates his fixed expenses for each car show to be $1,700. Allen wants to achieve operating income of $1,500 per show.

How many units must Allen sell to break even?