To promote a new brand of shoes, a shoe store will run a promotion using a jar containing 3 red balls marked "10% off." 2 white balls marked 430% off." and 1 green ball marked "60% off." Each customer will randomly select 1 ball from the jar to determine the discount that the customer will receive on any single pair of the new brand of shoes. Given that the new brand of shoes regularly costs $60 per pair, what is the average discount amount, in dollars, that the store can expect to give each customer due to this promotion?.
