Complex sentence: The policy of plunder and exploitation inflicted material losses to Polish industry, agriculture, infrastructure and cultural landmarks, with the cost of the destruction by Germans alone estimated at approximately €525 billion or $640 billion.
Split into simpler sentences: The policy of plunder and exploitation inflicted enormous material losses to Polish industry, agriculture, infrastructure and cultural landmarks. The cost of the destruction by Germans alone is estimated at approximately €525 billion or $640 billion.