seling expense) Total fored cost equats $11,310 (includes foued factory overhead and fied selling and adm nistrative expenso) Required: 1 Calculate the break even number of helmets 2. Check your answer by prepanng a contrbution margin income stafement based on the break-even units 1. Calculate the break-even number of helmets. helmets income statement if there is an operating loss, enter the amount as a negahive number using a munus pon