The shampoo and conditioner cost $10 each so 2*$10 = $<<2*10=20.00>>20.00
3 bottles of lotion cost $6.00 each so 3*$6 = $<<3*6=18.00>>18.00
So far she has spent $20+$18 = $<<20+18=38.00>>38.00
You need to spend $50.00 for free shipping and she has spent $38.00 already so she needs to buy $50-$38 = $<<50-38=12.00>>12.00 more in products
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