estimated quarterly cash flow

Please correct me if I am wrong or comment
The June 30 quarterly report cash receipts AUD $5,892,000
It would appear from the data in the report Galaxy is giving commercial terms (credit) to their customers.
Sales quantity for the quarter was 1661 tonnes
From report Price per tonne including VAT (17.5%)was technical grade USD $6240 ex VAT USD$5310
battery grade USD$6880 ex VAT USD$5855
So for this exercise I will use ex VAT of USD $5500 at exchange to AUD of.95 =AUD $5790
Sales in the report were 1661 tonnes x AUD$5790 = AUD$9,617,190
So cash flow should improve in September Quarter with debtors of $3,725,190 carried forward
Product sales in July were 611 tonnes. So for this exercise lets estimate sales of 1800 tonnes for the September Quarter at per tonne AUD $5790 = AUD $10,422,000. Without real data I guess that cash receipts this quarter should increase to between 9 and 10 million AUD
Under this scenario full production 17500 tonnes = annual sales of around AUD$100,000,000
Comments please