if you can figure this out correctly I will give you thanks five stars and brainliest promise!!!

Answer 1,260 Cards.
Step-by-step explanation: 210 x 2 = 420, 420 + 210 = 630+210+420 = 1,260.
Hope this helps? :)
Answer:
they have 1,260 because anna had 420, ronald had 210 and erika had 630 add them together you get 1,260
so sorry if this is wrong