Question 1129756
Let the original cost = {{{ c }}}
arrangement #1
discounted cost = {{{ .75*( .8*( .9c )) }}}
{{{ .75*.72c = .54c }}}
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arrangement #2
discounted price = {{{ .9*( .75*( .8c )) }}}
{{{ .9*.6c = .54c }}}
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The order of the discounts doesn't matter