I chaned her nappy after every feed she had 6 feeds in 24 hours and changed her obviously if she did a number 2...then I would change her before bed so i would use at least 7 in a day so thats 49 a week but more if she poo'd. I buy the size 3 pampers caterpillar flex nappies, 104 in a box from asda for 11pound odd, i think thats fair...they actually went down to £9 at christmas so i bought loads! But you would pay £8odd for 1 pack of nappies from say...boots?