Determine whether each of the following costs would be classified as product costs or period costs under a variable costing system. Commission fees for salespersons- period Glue for wooden chairsvariable product Fabric for T-shirts product Labor costs for producing TVs product Factory rent expensefixed period Factory utility costsvariable product Car mileage costs for salespersons period Administrative expensesfixed period Administrative Internet connection fees period Wagesassembly line product