Requirement 1. Compute the number of cartons of calendars that Team Spirit Calendars must sell each month to breakeven. Begin by determining the basic income statement equation. =Operatingincome Using the basic income statement equation you determined above solve for the number of cartons to break even. The breakeven sales is cartons. Requirement 2. Compute the dollar amount of monthly sales Team Spirit Calendars needs in order to earn $308,000 in operating incom Begin by determining the formula. (Round the contribution margin ratio to two decimal places.) What is the operating leverage factor at this level of sales? Begin by determining the formula. =Operatingleveragefact (Round the operating leverage factor to three decimal places.)