Mobile Telephone Expenses Robyn owns her own mobile telephone. Her mobile telephone call costs for the 2023 income year totalled $4,520. According to an analysis of Robyns mobile telephone statements over a three-month period, Robyn reliably estimates that 68% of these calls were work-related. Assume that Robyn took 4 weeks annual leave during the 2023 income year and was not reimbursed for any of these costs by her employer. what is her total deduction