Get one state from two different states

Hello, I use the Garbage Collection (helper) works like a charm, the only thing is that i don’t want 2 cards that tells me how long it’s left until time of emptying. Because we have 2 trash bins.
Trash bin 1 is emptied every 14days while trash bin 2 is emptied every 28 days.
so what i would like to do is have a card that tells me both. for example “5 days until trash bin 1”
and then it changes to " 14 days until both"
How do i do that? Thanks for help.
(I’m sorry for my English, i speak it better then in writhing.)