A company is considering implementing a lockbox system. There is an annual fee of $6,700 plus a transaction fee of $0.05 per payment. The average size of customer payments is $3,230, and there are 32 payments made daily on average. The company can earn an EAR of 3.18% on its cash balances. For the lockbox system to be adopted with a positive NPV, by how many days should the average collection time be reduced at a minimum? Fractional answers are OK. (Assume 365 days in a year.) Question options: 2.16 2.22 2.27 2.33 2.39