The minimum length L of a highway sag curve can be computed by
L = (((?) with subscript (2) - (?) with subscript (1)) (S) with superscript (2)/200(h + S tan ?)),
where ?1 is the downhill grade in degrees (?1 < 0°), ?2 is the uphill grade in degrees (?2 > 0°), S is the safe stopping distance for a given speed limit, h is the height of the headlights, and ? is the alignment of the headlights in degrees. Compute L for a 55-mph speed limit, where h = 1.9 ft, ? = 0.7°, (?) with subscript (1) = -5°, (?) with subscript (2) = 4°, and S = 336 ft. Round your answer to the nearest foot.