A lawn mower retails for $349. The dealer's overhead is 25% of cost, and normal operating profit is (16 2/3)% of cost. a. What is the largest amount of markdown that will allow the dealer to break even? (Do not round the intermediate calculations/steps. Round your answer to two decimal places.) Amount $ b. What rate of markdown will price the lawn mower at cost? (Do not round the intermediate calculations/steps. Round your answer to one decimal place.) Rate %