What is the contribution margin per hour of therapist time for each type of session (Injury Rehabilitation and Preventative Care)? When computing your answers, round contribution margin to two decimal places. Line Item Description Contribution Margin Injury Rehabilitation $fill in the blank 1 per hour Preventative Care $fill in the blank 2 per hour 2. What is the optimal mix of therapy sessions? If an amount is zero, enter "0". Line Item Description Optimal Mix Injury Rehabilitation fill in the