Find the premium of these cases. Use the adequate methods

A. If the rate per unit of real estate is $30 to $800. If the net worth of this property is $8000, what is the annual insurance premium?

B. Bicycle insurance company premiums range from $100 to $4000. Assume the owner has 4 different vehicles with these values (Bike 1 = 4000$, Bike 2 = 6000$, Bike 3 = 8000$ and Bike 4 12000$). Find the total insurance premium for your car.

C. If the annual premium for a particular asset is $150 and the per price rate increases from $40 to $1200. What is the exposure unit value in this case?