The amount of sales tax charged is proportional to the value of the item bought. if the tax on a $110.00 item is $8.50, what is the tax on a $150.00 item?

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny