This is a question about differences of accumulated change, thank for your help!

R2 = 524 . See the figure below. If r(X) is the rate of change of the revenue of a business and C(X) is the rate of change of the costs of the business X months after its establishment (both are measured in thousand dollars per month). The area of region R1 = 122 and the area of region 15 -10 RI R2 10 49 78 15.6 81.7 In the box below, give a complete sentence of interpretation (that is, with correct units) of the area of the region R1