Expenses can be calculated by summing all costs incurred during a specific period. The formula is: Total Expenses = Fixed Expenses + Variable Expenses + Operating Expenses + Non-Operating Expenses For example, if a company has $10,000 in fixed expenses, $5,000 in variable expenses, $3,000 in operating expenses, and $2,000 in non-operating expenses, the total expenses would be: Total Expenses = $10,000 + $5,000 + $3,000 + $2,000 = $20,000