Marigold's Maintenance Co. had the following results last month: Revenues were $6900, contribution margin totaled $3900, and operating income was $390. Revenues are expected to grow by 5% next month. Using the principle of degree of operating leverage (DOL) and based on the projected revenue increase, what can Marigold's expect in operating income next month? $663 $546 $585 $507 Attempts: 0 of 1 used