On 1/1/13, Shannon Polymers purchased equipment costing $600,000. For financial reporting purposes, the company uses straight-line depreciation with an expected useful life of 3 years and no residual value. For tax purposes, the deduction is 50%, 30%, and 20% in those years, respectively. Pretax accounting income was $500,000, $600,000, and $550,000 for 2013, 2014, and 2015, respectively, and the enacted tax rate is 40%. 1. Determine whether the difference creates a temporary/permanent difference. 2. Determine whether any temporary differences create a DTA/DTL. 3. Prepare the tax-related journal entry for 2013. 4. Prepare the tax-related journal entry for 2014. 5. Prepare the tax-related journal entry for 2015.