On 30-7-2008,our beloved lecturer teach us how to calculate
the net price for a chain discount...

These Are The Formula To Calculate The Net Price For A Chain Discount

NP = L(1-r1)(1-r2)(1-r3)

Examples:
1) A television set with a catalog price of RM3000 is offered a
chain discount of 30%, 10% and 5%. Calculate the net price.

From NP = L(1-r1)(1-r2)(1-r3), we get
= 3000 ( 1 – 30%) ( 1 – 10%) ( 1 – 5%)
= 3000( 0.7 ) ( 0.9 ) ( 0.75 )
= RM 1417.50

2) A sewing machine is advertised at RM2030 less 40% and 12%

From NP = L(1-r1)(1-r2)(1-r3), we get
= 2030 ( 1 – 40% ) ( 1- 12% )
= 2030 ( 0.6 ) ( 0.88 )
= RM 1071.84