**will give brainliest** must show work! harold chung keeps records of his expenditures. he wants to know how much he spends each month, on the average. his record for three months are shown below. what is his average monthly expenditure? month | expenditure september | $1,988.00 october | 2,234.50 november | 2,099.00 a) 1,999.00 b) 2,107.17 c) 2,234.50 d) 2,300.90