Audrey went to a post office and bought eight 42 cents stamps and eight 27 cents postcards stamps .What was the total amount of money audrey spent on stamps

Aschool puts on a play. the play costs $1,200 in expenses. the students charge $4.00 for tickets. there will be one performance of the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?