Answer:
a. Cash freed up by cash management:
= Amount received * speed increased by + Amount disbursed by speed reduced by
= 2,550,000 * 2 days + 1,110,000 * 1/2 days
= 5,100,000 + 555,000
= $5,655,000
b. Interest on freed up cash:
= 5,655,000 * 7%
= $395,850
c. No. It is less than the income earned from interest from freed up cash so it should not be implemented as it brings no additional benefit.