Explain me how the the first row of this problem was found. Please I already solved it but want to learn how it was found! not the answers.

I dont know how this was calculated just the basics:

1. what was the operations to find the first row???

another person told me that for the first quarter is Given, ok I understand that but what about 2nd quarter, 3rd quarter and year.Please explain me how you get that. Show me the operations you used to get the answer and I will give you a like. I want to learn please

Garden Depot is a retaller that is preparing Its budget for the upcomIng fiscal year. Management has prepared the following summary of Its budgeted cash flows: The company's beginning cash balance for the upcoming fiscal year will be $20,000. The company requires a minmum cash balance of $10,000 and may borrow any amount needed from a local bank at a quarterly interest rate of 3%. The company may borrow any amount at the beginning of any quarter and may repay its loans, or any part of Its loans, at the end of any quarter. Interest payments are due on any principal at the time it is repald. For simplicity, assume that interest is not compounded