Determine the desired ROI per session. (Round answer to 2 decimal places, e.g. 15.25.) Desired ROI per session eTextbook and Media Save for Later Attempts: 0 of 2 used Submit Answer (c) The parts of this question must be completed in order. This part will be available when you complete the part above. (d) The parts of this question must be completed in order. This part will be available when you complete the part above.