Okayyy. I genuinely think MLS professional examinations have to be among the most difficult examinations ever. ๐ญ The depth of knowledge, the breadth of what we're expected to know, and the level of understanding required are honestly overwhelming.
Someone bled you - they'll be paid
Screening is done by someone - they'll will be paid and the screening materials will be bought too.
The blood was collected in a blood bag- it was also bought
Finally the blood is stored in a blood bank- electricity is not cheap, the blood bank has to be maintained.