Sixteen$-$year$-$old Brent has lived on his own for two years and is considered emancipated by implied consent. Brent contracts with Dave for the purchase of a new mattress for $$150.$ Dave delivers the mattress and sends Brent a bill in the mail. In the meantime, Brent finds out the reasonable value of the mattress is only $$100.$ Brent feels that Dave took advantage of him and refuses to pay. Dave sues him for $$150.$ Assuming the bed is considered a necessary, what amount, if any, is Dave entitled to$?$

The actual price, $$150.$

The reasonable price, $$100.$

The difference between the reasonable and actual price, $$50.$

Dave is not entitled to any money