With the population aging and patients who have anxiety over sitting in a doctors office, some doctors are finding an opportunity to grow revenue by taking their show on the road. Some patients are wealthy and prefer the personal service, whereas others are elderly homebounds who cannot get out to the office. Recreating a physicians office in a home requires additional equipment that may costs in the thousands of dollars. For many this is a barrier because it is difficult to determine what sales might be before making the investment.

Assuming the cost to buy the necessary equipment to make house calls is $10,000 and assuming the average doctor plans to make a profit margin of 40%, how much in additional sales (in dollars) would be needed to break even?