3225,2 180,3 135,3090,3045。 Credit card overdraft 15000 will be repaid in five installments as follows: the first month:15000 * 0.0005 * 30+3000 = 3225 yuan. Second month (15000-3000) * 0.0005 * 30+3000 = 3180 yuan. The third month: 9000 * 0.0005 * 30+3000 = 3135 yuan. The fourth month: 6000*0.0005*30+3000=3090 yuan. Last month: 3000*0.0005*30+3000=3045 yuan.