Repeat Exercise 80 for V(x, y) = 400xe^−y and the region R: 0 ≤ y ≤ x, 0 ≤ x ≤ 1.

Data from Exercises 80

A community is laid out as a rectangular grid in relation to two main streets that intersect at the city center. Each point in the community has coordinates (x, y) in this grid, for −10 ≤ x ≤ 10, −8 ≤ y ≤ 8 with x and y measured in miles. Suppose the value of the land located at the point (x, y) is V thousand dollars, where V(x, y) = (250+ 17x)e^{−0.01x−0.05y} Estimate the value of the block of land occupying the rectangular region 1 ≤ x ≤ 3, 0 ≤ y ≤ 2.