Complex sentence: The shoot took four six-day weeks of filming and was hindered by heavy snowfall in December; one extra day cost the production £30,000 because the project was not insured against inclement weather conditions.
Split into simpler sentences: The shoot took four six-day weeks of filming and was hindered by heavy snowfall in December. One extra day cost the production a cool £30,000 ($48,000) as the project was uninsured against inclement weather conditions.