Let f(p) be the number (in hundreds) of laptops sold when the price is 'p' thousand dollars per laptop. Tick the correct interpretation of the statement f'(3) = - 5 When the price of the laptop is $300, the sale of laptops decreased by 5000 for every $1000 increase in the price. When the price of the laptop is $3000, the sale of laptops decreased by 500 for every $1000 increase in the price. When the price of the laptop is $1000, the sale of laptops decreased by 500 for every $100 increase in the price. When the price of the laptop is $3000, the sale of laptops decreased by 5000 for every $1000 increase in the price.