Complex sentence: Cost of the project was calculated to SKK 100 billion (about €330 million), therefore, in 1996, a less expensive variant VAL metro system was chosen, which had mostly used in France.
Split into simpler sentences: Cost of the project was calculated to SKK 100 billion (about €330 million). In 1996, a less expensive variant VAL metro system was chosen, which had mostly been used in France.