$10,344,000 includes $5,647,000 of construction / development...

$10,344,000 includes $5,647,000 of construction / development (Capital), but remember this is on a cash basis - so as a quick and dirty you could assume 30 day payment terms so $5m is representative of the expenses PAID i.e. the cost of first two months of the quarter = $7m opex run rate for a full quarter

I also don't believe we had mined, processed and definitely had not hauled 2x 27kt by 30 June, hard to estimate how much exactly. Like you say its too much guess work to be accurate

Something like 30,000 - 40,000t gives us a range of $7 to $5/dmtu

Too early to take much from that