january and february estimated sales for Sofia Medical supplies, Co. are 410,000 and 250,000 respectively. Her supplies purchaes are paid for during the following month, and are 400,000 in december, 210,000 in january, and 200,000 in february. Other monthly expenses (wages, salaries, lease payments, etc.) average 50,000 per month. Sofia's cash balance at the beginning of January is 5,000. She also has a target cash balance of 5,000. What is the maximum amount Sofia will need to borrow from a bank in order to maintain her target cash balance during january and february? a. 15,000 b. 40,000 c. 50,000 d. 5,000