Please give formulas to see how you calculated each box. Thank you

Q5) Using the following monthly income statement & cash flow data for ABC Co., answer the questions below (all figures in $). All credit sales turn into cash two months later (e.g. credit sales of $30,000 in January becomes cash inflow in March). Cash Credit Expenses Monthly Beginning Cash Cash Ending sales sales (all cash) Revenue Expenses Profit/Loss Cash inflow outflow Cash Month January 20,000 30,000 (30,000) February 20,000 60,000 (50,000 March 20,000 60,000 (40,000) April 60,000 30,000 (30,000) TOTAL>>