Extron, Inc., has only variable costs and fixed costs. A review of the company's records disclosed that when 100,000 units were produced, fixed manufacturing costs amounted to $200,000 and the cost per unit manufactured totaled $5. On the basis of this information, how much cost would the firm anticipate at an activity level of 97,000 units?

A. $485,000.

B. $491,000.

C. $494,000.

D. $500,000.

E. Some other amount not listed above.

The answer is B. Can you please show work? Thanks!