I HAVE THE ANSWER I JUST NEED HELP WITH EXPLANATION

The Bernard Corporation has the following budget estimates: If the company had cash of $80,000 at the beginning of the period, what is its budgeted ending cash balance? 280,000 (with margin: 0) 80,000 beginning balance plus cash inflows 90,000 and 680,000 minus cash outflows 400,000,20,000,5,000,20,000,5,000 and 120,000