Rob's Mobile Pizza Unit is a mobile wood-burning pizza oven that Rob sets up at local events. Rob budgets to sell his pizzas for $15 each, but customers can pay more for extra toppings. The pizzas cost him $6 to make on average. At the local music festival last weekend, Rob thought he would sell 300 pizzas, but he actually sold 320. His total revenue for the weekend was $5,120, and he spent $2,080 on food. required a) Calculate the total static budget variance b) Calculate the total sales-volumevariance. c) Calculatethe totalflexible budgetvariance. d) Explainthe flexible budget variance. e) Explainsome possible reasons for the flexible budgetvariance, 1) Calculate the sales price variance. g) Calculatethe costvariance