Answer:
The answers are:
A) $280,000 per year ; 71% of his salary is economic rent.
B) No
Step-by-step explanation:
Since the company that hires Janus will collect $200,000 in extra revenue, Janus should earn $280,000 per year. This includes a normal salary for a designer and the extra revenue generated by Janus's work ($80,000 + $200,000). The extra $200,000 can be considered Janus's economic rent. This represents 71% of his salary.
Janus's employer will not be able to earn an economic profit since it is her talent that generates the extra $200,000, so if she tried to lower her salary, competing firms could offer Janus a better salary up to the $280,000 level.