Original sentence: The construction of the 117 kilometer track to Taourirt costed 1.776 million dirham (aprox.The construction of the underground track and station-platforms also required more money then a ground-level track.The line is relative expensive as it has to run from the 400 meter above sea-level lying Rif town to Nador which is at sea-level.€ 180 million)
Edited sentence: The construction of the 117 kilometer track to Taourirt cost 1.776 million dirham (approximately €180 million).The construction of the underground track and station platforms also required more money then a ground-level track.The line is relatively expensive because it has to run from the 400m-above-sea-level in the Rif moutains to Nador, which is at sea-level