Complex sentence: The Dutch East India Company ended the deal in 1740 because the production and shipping from China proved to costly; however, Pronk's designs remained popular and were frequently copied, and some of his designs are still being produced.
Split into simpler sentences: The Dutch East India Company ended the deal in 1740 because the production and shipping from China proved too costly. However, Pronk's designs remained popular and were frequently copied, and some of his designs are still being produced.