Begin by completing the table by calculating the missing figures for (a). Then, continue with calculating the missing figures for (b), (c) and (d). (For amounts with a $0 balance, make sure to enter '0' in the appropriate field. Use brackets or a minus sign for a loss.) Net sales Opening inventory Net purchases Available inventory Closing inventory Cost of sales Gross profit Operating expenses Net profit(loss) 280,000 56,000 210,000 266,000 46,000 680,000 880,000 85,000 310,000 500,000 70,000 390,000 290,000 170,000 115,000 335,000 740,000 320,000 60,000 340,000 55,000 285,000 (25,000)