Complex sentence: These actions hence caused substantial time and cost overrun, and the film ended up costing 3 million (valued at about US $600,000 in 1948) and was the most expensive Indian film made till then.
Split into simpler sentences: These actions hence caused substantial time and cost overrun, and therefore the film ended up costing 3 million (valued at about US $600,000 in 1948). It was the most expensive Indian film made till then.