Successive Percentage Profit

The cost of manufacturing a car was \(\$10\,800\).

1. It was sold to a car dealer at a profit of \(10\%\) of the cost. Calculate the price the car
   dealer paid for the car.
   
2. The car dealer sold the car to a customer at a profit of \(15\%\) of the price he paid for it.
   
   
   Calculate how much the car cost the customer.
3. Calculate the percentage increase in the cost of the car from the manufacturer to the
   customer.