Assume there is a TV dealer who started a 1 month Google Adwords campaign. Its pay-per-click rate is 175 cents per click. It has a cart-conversion-rate of 5%. And during 30 days of campaign, Google Adwords displayed the dealer about 400.000 times with a click-through-rate of 15%. ROI is estimated to achieve a rate of at least 25%. What is the minimum marginal gross profit (retail price-wholesale price) cashed by the dealer from the retail sale of one such TV?