Randall and Dianne Wall live in St. Louis, Missouri. Randall and Dianne are each 30 years old, neither smokes, and they have no children or other dependents. Randall is attending law school full time and working part time (2018 earnings = $9,000). Dianne works full time (2018 earnings = $38,200). Their 2018 household income is more than 250% of the FPG (but not more than 300% of the FPG). Dianne's employer does not offer employee health insurance coverage. The Walls choose to purchase insurance through the federal exchange operating in Missouri. They are credit eligible for all 12 months in 2018. Their premiums for coverage vary by the type of plan.

a. Under a Gold plan, monthly premiums are $585 (covers 2) per month, so the annual cost of coverage is $7,020.

b. The second-least-expensive Silver plan (the benchmark plan) involves premiums of $468 per month (covers 2), or $5,616 per year.

c. Under a Bronze plan, monthly premiums are $390 (covers 2) per month, so the annual cost of coverage is $4,680.

What is the after-tax-credit cost of health insurance for the Walls under each of the plans described above?