definite integration

The profit $P(in million) of selling x million kg of coffee beans by a company in a year is governed by the equation dP/dx= 15-2.2x^0.1.What is the increase in profit if sales increase from 1 million kg of coffee beans to 4 million kg.(cor. To the nearest$10000)Ans: 6.781x10^7Pls show clear steps.