Answer:
cost for holding cash: 9.60% per annum
Explanation:
Baumol formula:
[tex]C = \sqrt{\frac{2TF}{k}}[/tex]
T = total cash needed = 960,000
F = fixed cost of selling securities = 180
k = opportunity cost for holding cash (interest rate) = ?
C = optimum = 60,000
[tex]60,000 = \sqrt{\frac{2(960,000)(180)}{k}}[/tex]
[tex]k = = \frac{2(960,000)(180)}{60,000^2}[/tex]
k = 0.096 = 9.60%