1. The mobile phone fee in the physical store is 2,800 yuan, and the handling fee for each credit card is 2,800 * 0.45% =12.6 yuan. The total handling fee is 15 1.20 yuan, so the actual cost of the mobile phone is 295 1.20 yuan;
Second, where are the prices in JD.COM? Obviously, it is worthwhile to adopt the first installment payment method.