The 21-22 annual plan [1] just shows "Technical Infrastructure" as 23.8% of "Programmatic", which is 76% of the budget, so 23.8% * 76% = 18%, or $27m.
"Technical Infrastructure" includes "all the engineering and technology" though. I'm not sure if a breakdown which includes server costs is available? I remember it being a pretty small piece of previous budgets.
