Assume you are now at the beginning of the year 2022 and are trying to evaluate company GrowthClassic Incorporated using the discounted cash flow valuation model. The marginal corporate tax rate of GrowthClassic is 25%.

GrowthClassic had operating income before interest and taxes for the year 2021 of $600 million. The firm had depreciation and amortization expense of $40 million that same year. Capital spending totaled $120 million during 2021. At the end of 2020 and 2021, working capital totaled $70 and $90 million, respectively. Estimate the free cash flow of the firm in 2021.