On 30 June 2016, an extract of the statement of financial position prepared for internal purposes, but excluding the effect of income tax, disclosed the following: Assets $ Cash 80,000 Inventory 200,000 Accounts receivable 85,000 Allowance for doubtful debts (15,000) Machinery 500,000 Accumulated depreciation (50,000) Goodwill 100,000 Liabilities Accounts payable 160,000 Long-service leave 50,000 Rent received in advance 20,000 Additional information: 1. The following balances existed at 1 July 2015: Deferred tax asset $10,000 Deferred tax liability 12,000 There have been no recorded changes to these balances since 1 July 2015. 2. The machinery was acquired on 1 July 2015. Depreciation for accounting purposes was 10% per annum (straight-line method), while 20% per annum (straight-line method) was used for tax purposes. 3. The tax rate is 30%. The future deductible amount for the machinery as at 30 June 2018 is:

$500,000

$100,000

$450,000

$400,000