Predicting FY18 first half revenue and profit

It seems folks here have incresed interest in the 1H report. Can we discuss and predict 1H revenue and profit given we have 2 quarterly reports handy. my workings below
Rev receipt : 37.5
Rev underlying from rev receipt: 23 (using 1H17 ratio)
Deferred rev: 5.2
Total rev: ~28.2
Total cost: ~22
EBITDA: ~6
Any thoughts and input?