The monetary system used. Gu Shiyi earns 1200 wen from selling bamboo rats (over one tael of silver). She spends several taels of silver on meat, grain, seasonings, fabric, shoes, and other supplies. Prices: bamboo rats 30 wen/jin, pork belly/fat 18 wen/jin, lean meat 15 wen/jin, ribs 10 wen/jin, salt 500 wen/10 jin, soy sauce 200 wen/jar, vinegar 50 wen/jar, rock sugar over 1 tael/30 jin, brown sugar 400 wen/5 jin, soybean oil over 400 wen/5 jars, sweet potatoes 1 wen/2 jin.
