X Your answer is incorrect. Bob Downe is auditing Red Gum Home Furniture (RGHF), a manufacturer and retailer of boutique home furniture. RGHF was founded 25 years ago by a husband and wife team and has grown rapidly in the past five years as solid, environmentally friendly, wooden furniture has grown in popularity. However, although RGHF's owners have attempted to expand the administration department to keep pace with the growth in sales, some systems are not operating as effectively as they should. This is partly due to difficulty in attracting and retaining accounting staff with appropriate experience and skills. RGHF's owners have recently realized that they need to increase pay and improve conditions for the accounting staff to avoid having periods with unqualified staff, particularly for sales invoice processing. The staff shortages have resulted in sluggish performance in processing invoices, sending out customer statements, and collecting cash from customers. In addition, there have been numerous mistakes in processing sales invoices, some of which have been discovered after customer complaints. Bob is selecting a sample of sales invoices for substantive testing. All documents relating to sales invoices for the past five years are stored in boxes in the shed behind the office. The shed is very small and the boxes are stacked on top of each other because the shelves are full. Due to the damp conditions, some labels have peeled from the boxes, so it is not clear which boxes relate to the current year. Which of the following apply to this audit? (Several choices may be correct.) Bob needs to ensure he selects a sample of sales invoices from the entire year. Bob should consider stratifying the sample to make sure that the sample includes time periods where staff conditions were different. To gather evidence about existence of the accounting records, Bob would sample the invoices and then trace the details of the transactions to the sales journal. Bob should consider the patterns in customer complaints-do they relate to specific periods or specific types of sales? Controls appear weak, and therefore Bob should consider performing a substantive audit. Even if Bob is planning a substantive audit, he should still select a small sample of controls to test when planning the audit. There is no issue if Bob grabs the invoices closest to the door, as these most likely relate to the year under audit