Flashbinder Guitars, Inc. is considering a lockbox system that will increase its check processing cost by $.20 per check. The company estimates an average check size of $900 and expects any funds freed up by the new lockbox system can be invested in an account that earns 4% per year before taxes. What reduction in collection time is necessary for the lockbox to be beneficial to Flashbinder Guitars Inc.?

a. 1.96 days

b. 2.03 days

c. 1.73 days

d. 2.15 days

n