She needs 5 backpacks that are $20.00 each so that's 5*20 = $<<5*20=100.00>>100.00
The backpacks are currently 20% off so that's 100*.20 = $<<100*.20=20.00>>20.00 off
The backpacks costs $100.00 but are $20.00 off so they will cost $100-$20 = $<<100-20=80.00>>80.00
She wants each of the 5 backpacks to have her grandchild's name monogramed on them which costs $12.00 each so that's 5*$12 = $<<5*12=60.00>>60.00
The backpacks cost $80.00 and the monogramming costs $60.00 so together they will cost $80+$60 = $<<80+60=140.00>>140.00
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