What annual interest rate would you need to earn if you wanted a $1,000 per month contribution to grow to $75,500 in six years? (Do not round intermediate calculations and round your final answer to 2 decimal places.) Veggie Burgers, Inc. would like to maintain its cash account at a minimum level of $254,000 but expects the standard deviation in net daily cash flows to be $12,900, the effective annual rate on marketable securities to be 4.6 percent per year, and the trading cost per sale or purchase of marketable securities to be $32.00 per transaction. What will be its optimal upper cash limit? (Use 365 days a year. Do not round intermediate calculations, Round your final answer to 2 decimal places.)