11. A restaurant manager is considering keeping the business open two hours later. He estimates his labor cost for the additional two hours to be $28? and the cost for additional utilities and other expenses to be $?1. If the variable rate [covering all other variable expenses) for the restaurant is {1.614, hov:r much additional business in sales does the manager need to bring in during those two extra hours to break even? 12. 1What are the four classications of marketing approaches