Sales are $550000 and variable costs are $220000. W hat is the contribution margin ratio? 60% O 15090 O Cannot be determined because amounts are not expressed per unit. o 40% Click if you would like to Show Work for this question: Open Show Work If a company had a contribution margin of $1400000 and a contribution margin ratio of 40%, total variable costs must have been O $560000. $840000. O $3500000. $2100000. Click if you would like to Show Work for this question: Ope