The elevation of point M is 875.4. A transit was set at point M and a leveling rod was held vertically at point N. The horizontal cross line of the telescope was inclined so the reading of the horizontal cross line on the rod was 12 ft. The horizontal distance between the points is 250 ft. If the instrument is 5.25 ft above point M and the reading of the vertical limb is 2°, what is the elevation of N.