P8.1 A restaurant with an average check of $14 per guest has the following average monthly figures: Sales revenue $700,000 Variable costs 434,000 Fixed costs 168,000 a. What is breakeven sales revenue? b. If actual sales revenue was $640,000, what would the restaurant's op- erating income be? C. If actual sales revenue was $640,000, how many fewer customers per month would be served than at the forecasted sales revenue level of $700,000? The average check remains at $14