Answer:
$15,000 decrease
Step-by-step explanation:
The formula for calculating the net increase or the decrease in the cash is:

Given that:
Cash inflows from the operations = $35,000
Cash Flows from the Investing Activities = $30,000
Cash Flows from the Financing Activities = $20,000
Net Increase/Decrease in Cash = $35,000 - $ 30,000 + $ 20,000
Net Increase/Decrease in Cash = - $15,000
Since, negative sign signifies decrease.
So, there is net decrease of $15,000 in cash.