帮忙看一下有没有语法错误,顺便再美化一下语言

帮忙看一下有没有语法错误,顺便再美化一下语言
I have had a keen interest in business and finance since childhood,and this passion for the subject has continued to develop.Thus,I try to trade the goods though observing needs of each student and analyzing the market information.When I entered university,I find a second-hand kitchenware and stationery is very popular due to the low price and good quality.By recycling,processing on second- hand goods,then sold them at a low price relative to the original prices of goods.These practices do not only greatly improve my bargaining skills but also give me confidence to have deeper understand on the field of finance.