单选题 A company needs $150,000 each year for regular payments. Converting the company’s short-term investments into cash to meet these regular payments incurs a fixed cost of $400 per transaction. These short-term investments pay interest of 5% per year, while the company earns interest of only 1% per year on cash deposits. According to the Baumol Model, what is the optimum amount of short-term investments to convert into cash ineach transaction?