James bought a batch of laptops and set the sellig price at ＄$$2000$$ each. In this case, he would earn a profit of＄$$60000$$. But later, the cost of each laptop decreased by $$\frac{1}{5}$$ of the original cost, and the total profit would increase by $$30 \%$$. How many laptops did James buy at first? 
Overseas Competition->Knowledge Point->Word Problem Modules->Word Problems in Economics->Basic Profit and Loss Concepts