Donut farming help

Best explanation I've come across on KEM farming can be found on Muhsterino's thread:

https://forums.ea.com/en/the-simpsons-tapped-out/discussion/149536/kwik-e-mart-also-known-as-kem-farming-guide#latest

Hi, I’ve heard the term KEM farming going about I kinda get it but can someone please explain it in a lot easier way for me please and I’m lvl. 106 by the way thanks

Buy Kwik e Mart's, sell Kwik e Mart's after built, buy Kwik e Mart's, sell Kwik e Mart's, repeat.. oh and have your XP collider on.

"urbanqlegend;d-215908" wrote:
Hi, I’ve heard the term KEM farming going about I kinda get it but can someone please explain it in a lot easier way for me please and I’m lvl. 106 by the way thanks

https://forums.ea.com/en/the-simpsons-tapped-out/discussion/149536/kwik-e-mart-also-known-as-kem-farming-guide#latest
This thread may also be helpful:
https://forums.ea.com/en/the-simpsons-tapped-out/discussion/90074/tips-for-new-players/p1