la neta lo a mirado pero se me olvido if I'm right I think it' c
I’m not sure maybe if there was an imagine I’d be able to answer this question.
60 subs
Because it’s 15 per 45 and 45 times 4 is 180 which means that in 3 hours or 180 minutes they sold 15 times 4 amount of subs and 15 times four is 60. Hope this helps. Sorry if the explanation isn’t that good