I don’t know how much cookies she brought

Answer:
When she gave out the 12, that must mean that she gave out another less than the half she gave out in the morning, so I'm saying the answer is 44
Step-by-step explanation:
Because if you really think of it, use 40. 40 ÷ 2 = 20 - 12 = 8, REALLY CLOSE!
44 ÷ 2 = 22-12 = 10. YAAAS GOT IT! So its 44