Respuesta :

6%=0.06

28(0.06)
= 1.68 ---> tax

28+1.68
= 29.68

Jen and Sarah spent 29.68 dollars including tax

I hope this answer helped you and have a wonderful day!
I don't really know how else to say this because every time I press the button it says it needs to be longer but anyway, the answer is $24.00!