Complex sentence: Its principal products are milk, fur, wool, egg, etc. Aculco's inner commerce principally occurs at the municipal market, while its outer commerce is with Toluca, Mexico City and Queretaro.
Split into simpler sentences: Its principal products are milk, fur, wool, egg, etc. Its inner commerce principally occurs at the municipal market. Its outer commerce is with Toluca, Mexico City and Queretaro.