@alphaod ..... My figure of "a little over HKD30K" was based on a quick calculation of the value of the vouchers x the number of eligible customers (and then there's the coffee + cake, hence the 'little over'....)

I've just noticed that gpia comes up with a similar calculation (posts # 5 & 8). I did my complex sums independently, so hopefully we're not both wrong with our maths. Or maybe we are ...??!