9.2 Marketing Channel Profitability (Figure 9-5)

The link for the figure is here: https://rogerbest.com/nav.cfm?A=N&C=9&P=1

Make sure you use the Roger best tool that I provided from the link to answer question A and B below:

A. How does the net marketing contribution and marketing ROI change if the business modifies its sales mix to 30 percent direct sales, 40 percent agent distributor, and 30 percent distributor retailer?

B. How does the net marketing contribution and marketing ROI change if the business replaces the direct sales channel with the agent-distributor channel, with a sales mix of 60 percent agent distributor and 40 percent distributor retailer?