UARANTHINGS CORPORATION has the following information relating to its cash flows from operating activities for the year ended December 31, 2020: Outflow for inventory purchases 110,500 Inflow from customers 200,800 Outflow to pay salaries 80,400 Outflow for other operating expenses 70,600 Inflow from interest revenues (long-term investments 10,700 Required: How much is the net cash flow from operating activities