The following information is available regarding Nikki LTD's activities for 2021:

1. A Plant asset with a book value of $10,000 was sold for $8,000.
2. 10,000 shares of common stock with a stated value of $10 a share were issued for $20 a share during the year.
3. The company sustained a net profit for the year of $40,000. Depreciation amounted to $20,000, and a gain of $10,000 was realized on land sale for $40,000 cash.
4. During the year, treasury stock costing $50,000 was purchased.

Question:

How much is the total net change in cash for the year?