Answer:
LLC Description C Corp. Description
(1) Pretax earnings $18,000 4%*$450,000 $18000 4%*$450,000
(2) Entity level tax 0 $2,700 15% × (1)
(3) After-tax entity earnings $18,000 (1) – (2) $15,300 (1) – (2)
(4) Owner tax $5,040 (3)*28% $2,295 (3)* 15%
(5) After-tax earnings $12,960 (3)- (4) $13,005 (3) – (4)