$90 Lola Inc. produces a product with the following revenue structure: Selling price The actual results at the end of the year, December 31, 20x9, are given below: Actual Selling price $81 Variable cost per unit 21 Actual volume 30,000 What is Lola's sales price variance for the year 20x9? (use a negative number to indicate an unfavourable variance and use a positive number to indicate a favourable variance.) Your