Ichabod runs a clothing store in London.He recently purchased 1000 dress shirts that had a manufacturer's list price of $35.On each shirt there was a trade discount of 10%, 8% and 6% from the manufacturer. Ichabod's store has operating expenses that are 35% of the selling price and rate of markup is 60% on selling price.

What was the rate of markdown from the regular price of the shirts to the break-even price of the shirts?