14-23 Optimal Upper Cash Limit (LG14-8) Veggie Burgers, Inc. would like to maintain its cash account at a minimum level of $247,000 but expects the standard deviation in net daily cash flows to be $12,200, the effective annual rate on marketable securities to be 3.9 percent per year, and the trading cost per sale or purchase of marketable securities to be $28.50 per transaction. What will be its optimal upper cash limit