Craig worked for a small architectural firm as an apprentice, earning $$36,000$ a year. The firm offers no group insurance, so Craig sought his own individual life and disability coverage. The insurance company agreed to cover Craig to a maximum benefit of $70\%$ of his then$-$current salary. In order to keep premium costs to a minimum, Craig decided to take out only $$1,500$ a month of coverage. He wanted to keep his options open for future insurance, so he also purchased a Future Purchase Option $($FPO$)$ rider to allow him to acquire up to $20\%$ of the initial face amount of coverage at different intervals. This rider also lets him get that coverage without having to provide medical underwriting as long as he qualifies financially. It is now four years later and Craig is earning $$60,000$ a year.

What is the maximum amount of additional coverage he could apply for this year under the FPO rider?

Question $6$ options:

A$)$

$$400$ per month

B$)$

$$600$ per month

C$)$

$$2,000$ per month

D$)$

$$300$ per month