Monica paid sales tax of $1.50 when she bought a new bike helmet. if the sales tax rate was 5% , how much did the store charge for the helmet before tax.

becky's day
10% eating
15% free time
10% homework
25% school
40% sleep

school - __ hours
eating - __ hours
sleep - __ hours
homework __ hours
free time - __ hours

i will you !