I'd check Macy's or outlet stores for clearance totes; you could find a great deal on a designer bag and get the warranty too 
Not sure what her style is, but maybe a Thirty-One bag? I have a few of those and they seem pretty rugged, although not sure about carrying heavy books every day. Maybe Abercrombie? Or Hollister? Also check out TJMaxx or Marshall's - they often get in good, quality name brand bags for much less.
When my DD was 15, she too wanted a tote vs a backpack. We got her one at American Eagle. After about a week of carrying it, she pulled out the Jansport backpack. Style was not worth the uncomfortable back pain
Not sure what her style is, but maybe a Thirty-One bag? I have a few of those and they seem pretty rugged, although not sure about carrying heavy books every day. Maybe Abercrombie? Or Hollister? Also check out TJMaxx or Marshall's - they often get in good, quality name brand bags for much less.
When my DD was 15, she too wanted a tote vs a backpack. We got her one at American Eagle. After about a week of carrying it, she pulled out the Jansport backpack. Style was not worth the uncomfortable back pain


There are lots of reasonably durable items manufactured that don't carry Coach prices. The Vera Bradley bags are a good example. The one my younger kid has now cost me under $40, buying last year's colors and looking for codes. She's on her second year with it and it's fine.
but I'm sure it is probably social pariah material.