How do I propose this to her?

I owe my mom money and she has a right to be upset, because I bought something which put me off budget and ruined her chance at new glasses she really needs, and made her pay the whole cable bill this month by herself. My plan is to sell the item, but it may take time. I also could give her an equivalent amount of weed which I already have, but it’s iffy whether she’d go for either one. I feel like she inadvertently tries to burst my bubble a lot of the time. I’m always afraid of how she’ll react to anything I do or say or don’t do or don’t say, and now even more so because she’s closed herself into her room and has given me the silent treatment since yesterday. Should I just tell her through the door? ask to talk first? I’m kind of afraid she’s not saying anything because she’s following the “If you don’t have anything nice to say, don’t say anything at all” rule, and I don’t wanna get chewed out again.

Maybe you should ask her if either of your ideas would work for her?