Question 714523
You need a few more words here.
Is $89.95 the price before the discount and tax? If so
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The discounted price is {{{ 89.95 - .15*89.95 = 76.458 }}} 
When the sale is made, the 6% tax is taken out, so
The final price is {{{ 76.46 - .06*76.46 = 71.87 }}}
$71.87