求教credit在文中何解？

The total quantities of the defected items are about 15% and these items are not usable for our customer. As I mentioned before, our customer is very picky on the quality of this product and we can not afford to have such defectsWe value our business relationship with you, and after receiving samples from you with a great quality and requesting an increased quality control on your end we were hoping to minimize such defects to no more than 2%.Please work with us on providing a credit for 13% of the defected product.