please give me step by step

You are the inventor of "The Touch, a wristband that sends various touch signals (vibrations, pinpricks, etc) to your skin to communicate common messages that you might ordinarily receive on your phone, interfering with driving or other sighted activities of your sales projection of 50,000 units is correct, what is the maximum amount you can spend on advertising and not result in a loss for the business? Variable Cost per "Touch Unit Overhead, Salaries, and other fixed non-advertising costs Introductory Price $72 $619,298 $127 Currency (US) NEXT QUESTION PREVIOUS QUESTION 5 7 8 9 10 6 2 3 4 1