The amount of money we saved is the difference between what we pay at Store A versus what we pay in Store B, including sales tax.
Then, we calculate what we are charged in Store A ($1200 + 6% sales tax):
[tex]1200\cdot(1+0.06)=1200\cdot1.06=1272[/tex]In Store B ($1350 + 7% sales tax):
[tex]1350\cdot(1+0.07)=1350\cdot1.07=1444.50[/tex]Then, we save:
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