What is the excel input formula in the above question? Especially in all other conditions part

Trading Account Expense Ratio Trading account expenses are expressed as a percentage of trading account revenue. For example, if trading account revenue is $20,000 and the expense ratio is 60 percent, the trading account expenses are $12,000 and the trading account gross profit would be $8,000. The expense ratio can exceed 100 percent if there are trading losses in addition to salaries and overhead. If volatility during a year is expected to be high and the economy during that year is expected to be poor, the trading account expense ratio should be 110 percent. If volatility during a year is expected to be normal and the economy during that year is expected to be poor, the trading account expense ratio should be 90 percent. In all other conditions, the expense ratio is expected to be 60 percent. Format cells for percentages