Park Company sells drones for a price of $1,500. The variable cost for each drone is $850. The fixed costs associated with the drone amount to $800,000 per year. Assuming that the tax rate is 30 percent and the desired profit level is $177,100 after tax, compute the required unit sales level. n Select one: O a. 1,620 unit O b. 1,520 units c. 1,320 units Od. 1,420 units