26. Assume you are auditing a retail department store and want to estimate the dollar amount of errors on sales invoices using probability-proportional-to-size sampling. Which of the following is true? The risks of incorrect acceptance and incorrect rejection are greater than for a classical variables sampling plan. Tolerable error is ignored. An invoice with a large balance has a greater chance of being selected than one with a smaller balance. The estimate will be unreliable if the error rate is small