Please explain if necessary

Sue has a small stall at a local market that runs every first Saturday of the month, selling dog shampoo.

At the June 2018 market day, a friend of Sues buys shampoo worth $400. She pays Sue $300 on the spot, and Sue agrees to receive the remaining $100 at the July 2018 market day.

A supplier invoices Sue for three months worth of stock on 30 June 2018. He delivers the stock to Sues stall at the July market day. Sue pays him on 14 July 2018.

What amount, if any, is returned as assessable income in Sues 2017-2018 income year?

What amount, if any, is allowed as a deduction in Sues 2017-2018 income year?

The Income Tax Equation Taxable Income Assessable Income Deductions Section 6-5(2) If you are an Australian resident, your assessable income includes the ordinary income you derived directly or indirectly from all sources, whether in or out of Australia during the income year Section 8-1 | You can deduct from your assessable income any loss or outgoing to the extent that: It is incurred in gaining or producing your assessable income; or It is necessarily incurred in carrying on a business for the purpose of producing your assessable income. a. b