Data Units, Memory Stats

I have a couple questions:

Under Operating System > Process List,

1. Does "Memory Usage" refer to the average memory usage, or is it the memory usage as it was measured when you first started up Speccy?

2. Does Speccy go by the older definition of "MB", "GB", etc. or by the IEC/SI definitions? In other words, does "MB" mean 10⁶ bytes or 2²° bytes?

Thanks.