Agreed, I take the September 4c estimated cash outflow for the...

Agreed,
I take the September 4c estimated cash outflow for the next quarter, item 9.2 product manufacturing and operating costs $4088k. Then add the average mark up from the previous four quarters, at 43%
4088 + 43% = 5858k receipts
Or alternately sum the bars from the companies revenue forecast. Use Sept, Oct, Nov as these will more accurately match actual receipts in the December quarter due to the normal lag between billing and receipt
1.9 +2.1+2.2 = 6.2 m
Getting a similar result from two different methods gives greater confidence, but there are fudge factors (in using 43% and slipping a month to get cash received), that introduce potential error so time will tell.
LPEs estimate of total costs for the December quarter is 5309k, so a profit range of 5858 - 5309 = 549k or 6200 - 5309 = 891k
Not to shabby given this base is locked in for 7.2 years, operating costs(staff, admin, corp, adv) are largely geared now for a 200gwh business. Just the additional electricity sold at 18% margin to add.