Assume you are the product manager for Snickers chocolate bars. You sell these to retailers for $ 0.50 each. Each Snickers bar package contains a $ 0.10 coupon that consumers can redeem by returning it to the manufacturer (i.e., you). Based on historical data, you expect 10% of the consumers to redeem their coupons. It costs you $ 0.09 to manufacture each bar. In a normal year, you sell 10 million bars, and spend $ 10 million on marketing campaigns. In order to boost sales this year, you are planning to launch an additional campaign involving TV advertising and in-store displays. This additional campaign will cost you $ 4 million. How many additional Snickers bars will you need to sell to break-even on the additional marketing spending/investment of $ 4 million?