Taxable income and pretax financial income would be identical for Vaughn Co, except for its treatments of gross profit on installment sales and estimated costs of warranties. The following income computations have been prepured. Taxable income 2019 2020 2021 Taxable income and pretax financial income would be identical for Vaughn Co, except for its treatments of gross profit on installment sales and estimated costs of warranties. The following income computations have been prepured. Taxable income 2019 2020 2021