Robinson expects its 2018 sales and cost of goods sold to grow by 5 percent over their 2017 levels.

a. What will be the effect on its levels of receivables, inventories, and payments if the components of its cash conversion cycle remain at their 2017 levels? What will be its net investment in working capital?

b. What will be the impact on its net investment in working capital in 2019 if Robinson is able to reduce its collection period by five days, reduce its inventory period by six days, and increase its payment period by two days?