Jean needs to buy 10 new pairs of pants.  A store is running a sale for 20% off.  If the pants normally retail for $45 each how much will she need to pay for all of them after paying a 10% tax?
The discount is 45*.2=$<T>multiply(45, 0.2)=9.0 off each pair
So she pays 45-9= $<T>subtract(45, 9)=36 each
So it will cost 36*10=$<T>multiply(36, 10)=360 before tax
The tax will add 360*.1=$<T>multiply(360, 0.1)=36.0
So she has to pay 360+36=$<T>add(360, 36)=396
