Adam bought three laptops for his office at a total cost of $1,300. the shopkeeper tried to sell adam some upgrades and accessories that would have doubled the price of the first laptop and tripled the price of the third laptop, increasing the total cost to $2,400. adam declined to buy the upgrades and accessories as he had already spent a lot on the first laptop, in fact $100 more than the combined price of the second and third laptops. what are the original individual prices of the three laptops?