The Greensboro Performing Arts Center $($GPAC$)$ has a total capacity of $7,500$ seats: $1,900$ center seats, $2,400$ side seats, and $3,200$ balcony seats. The budgeted and actual tickets sold for a Broadway musical show are as follows:

Ticket Price Percentage Occupied

Budgeted Seats Actual Seats

Center $ $8080\%85\%$

Side $707075$

Balcony $607565$

The actual ticket prices were the same as those budgeted. Once a show has been booked, the total cost does not vary with the total attendance.

Required:

Compute the following for the show:

$1.$ The budgeted and actual sales mix percentages for different types of seats.

$2.$ The budgeted average contribution margin per seat. Assume the ticket price is also the contribution margin.

$3-$a$.$ The total sales mix variance.

$3-$b$.$ The total sales quantity variance.

$4.$ The total sales volume variance.