<image>Below is a statistical chart showing the sales of leather garments at Xingxing Clothing Store and Mengyuan Clothing Store. Based on the data in the chart, answer the following questions.

(1) From September to October, how many percent more leather garments did Mengyuan Clothing Store sell compared to Xingxing Clothing Store?
(2) On average, how many pieces does Xingxing Clothing Store sell per month?