math
posted by fizz .
2.FIND THE TRADE DISCOUNT
cost price = RM1780
rate of trade discounot = 30%,10% and 5%
as we know to get trade discount is= list price X trade disount rate
so i do : RM1780x0.3xo.1xo.o5 = RM2.67
BUT in my book the answer is RM714.67.
WHAT the step or formula that i cannot make to solve this question .pls help me

One step calculation
price = 1780(.7)(.9)(.95)
= 1065.33
Discount = 17801065.33 = $714.67
or
first discount = .3(1780) = 534
leaving 1246
2nd discount = .1(1246) = 124.60
leaving 1121.4
3rd discount = .05(1121.4 = 56.07
leaving 1065.33
Discount = 1780  1065.33 = 714.67 as above
your calculation is a meaningless calculation.
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