Thomas buys a weight vest.  It weighed 60 pounds and worked well for him in the beginning but after a bit of training he decides he wants to increase the weight by 60%.  The weights come in 2-pound steel ingots.  Each ingot cost $5 and if you buy more than 10 you get a 20% discount.  How much does it cost to get the weight he needs?
Give me a solution to this problem