determine the taxable income and the tax payable/refundable of the following resident taxpayers

During the income year ending 2020, Jonathan has a gross salary of $155,000 (PAYG tax withheld is $48,500), a fully franked dividend of $56,000 and an unfranked dividend of $7,000. He had incurred work related travelling expense of $ 8,500. He bought a laptop for $2,500 at 01/07/2019, and used it mainly for work purposes. He estimates that he used the laptop 80% for work. For tax purposes, he could use the laptop for 5 years and he decides to use prime cost method to calculate decline in value. His electricity bill at home is $3,700 during income year 2020 and he estimated 40% of the electricity bill is work related expense when he worked from home. He has no other deductions except for those mentioned above