please help, I don't understand how I got it wrong. I tried this process by doing this:

Sales = $50

Cash Expenses = $30

Interest paid = $3

Taxes = $1

Dividends paid = $3

Capital Expenditures = $8

Free cash flow = Sales - Cash Expenses - Interest Paid - Taxes - Dividend Paid - Capital Expenditures

= $50 - $30 - $3 - $1 - $3 - $8

= $5

In 2021, Johnson Controls reported the following accounting items (in millions of dollars): Sales =$50 Cash Expenses =$30 Depreciation =$5 Interest Paid =$3 Taxes =$1 Dividends Paid =$3 Capital Expenditures =$8 What were the firm's Free Cash Flows in 2021? (Note: Enter your answer without the millions or the dollar sign, so if you think the answer is $5 million, just enter 5)