NEED HELP

A company had a net income of $100,000 last year. Depreciation was $10,000, they paid $ 10,000 in dividends, bought a $50,000 machine with cash and paid back a $30,000 loan to a bank. Receivables increased by $50,000 during, the year. If they started the year with $40,000 cash in their account, how much cash did they have at the end of the year