Alex works for a company with a 401(k) plan. He currently earns $80,000 in gross salary and contributes 8% of his gross salary into his 401(k) account. If his marginal tax rate is 33%, how much income tax liability is he saving by making tax deductible contributions to his 401(k)?

Caleb construction (cc) incurs supervisor salaries expense in the construction of homes. if cc manufactures 100 homes in a year, fixed supervisor salaries will be $400,000. with the current construction supervisors, cc's productive capacity is 150 homes in a year. however, if cc is contracts to build more than 150 homes per year, it will need to hire additional supervisors, which are hired as full-time rather than temporary employees. cc's productive capacity would then become 200 homes per year, and salaries expense would increase to $470,000. how would cc’s salaries expense be properly classified? fixed variable mixed stepped curvilinear