Complex sentence: The purchase price of a photomask can range from $1,000 to $100,000 for a single, high end phase shift mask; as many as 30 masks (of varying price) may be required to form a complete mask set.
Split into simpler sentences: The purchase price of a photomask can range from $1,000 to $100,000 for a single, high-end phase-shift mask. As many as 30 masks (of varying price) may be required to form a complete mask set.