Need excel formulas

Problem 4-10 points Calculate the annual worth in year 1 to 8 of the following series of incomes and expenses. Interest is 12% per year. Year Income ($ per year) Expense ($ per year) 0 -$20,000,000.00 1-4 8,000,000.00 -$1,000,000.00 $ $ 5-8 9,000,000.00 -$2,000,000.00 Dreklame