during the year a machine costing rs 50 000 with accumulated depreciation of rs 30 0 609926

From the following information calculate cash flow from investing activities.

Additional Information:

1. During the year, a machine costing Rs.50,000 with accumulated depreciation of Rs. 30,000 was sold for Rs.25,000.
2. Patents were written off to the extent of Rs.30,000 and some patents were sold at a profit of Rs.25,000