AHZ Accounting, page-40

Hi, This is my first post on HC and would like some help please.
According to note 6 of the annual report asat 30 June 2016 Other receivables and prepayments were $1.89m.
From what I can deduce roughly $1.25m of this is due to 'capital equipment sold to Mater Misericordiae Hospital in Townsville'. I arrived at this figure by subtracting the 30 June 2015 balance of $639,469 from the $1.89m total as they commented that the 'Balance also includes prepayments and security deposits for rental of corporate offices similar costs were included in June 2015.'
Does anyone know if these are still receivables? I have emailed the company but haven't heard back yet.
The reason I ask is the 31 Dec 2016 report has Trade and Other Receivables as $6.076m, unfortunately the half yearly doesn't give the breakdown between actual trade receivables and other receivables.
If this $1.89m is still a receivable asat 31 Dec 2016 then I was expecting trade receivables to be higher given the increased revenues of September and December quarters hadn't been equally translated to higher cash receipts yet.
FYI my model assumes roughly 45% of revenue for the quarter is receipted in that same quarter.
Eg Of the Revenue for September qrt of $6m I am factoring $2.78m of that to be receipted in the September quarter with the remainder (roughly $3.3m) becoming receivables asat 30 Sept.
There is also $594k of other income on the March 2017 4C, does anyone know if this refers to some of this $1.89m other receivables being converted to cash?