The following guide chart shows this and is based on 99p per CD at which nearly all are priced (including if jewel cases are required)
It shows the accumulating discounts and reduced postage charges based on the more you buy the cheaper it is per unit. This will save having to use the shopping basket in order to find out:
QUANTITY PRICE WITH DISCOUNT POSTAGE TOTAL TOTAL WITH JEWEL CASE (Yodel)
1 CD..................£0.99p..................................... + £1.75.............= £2.74................£4.74
2 CDs................£1.58........................................+ £1.95.............= £3.53................£5.33
3 CDs................£2.08........................................+ £2.05.............= £4.13................£5.83
4 CDs................£2.77........................................+ £2.25.............= £5.02................£6.52
5 CDs................£3.46........................................+ £2.45.............= £5.91................£7.21
6 CDs................£4.16........................................+ £2.65.............= £6.81................£7.91
7 CDs................£4.85........................................+ £2.85.............= £7.70................£8.60
8 CDs................£5.54........................................+ £3.05.............= £8.59................£9.29
9 CDs................£6.24........................................+ £3.25.............= £9.49................£9.99.
10 CDs..............£6.93........................................+ £3.45.............= £10.38..............£10.68