What should I do regarding zakat, usury, expiations for oaths, and overdue debts, what is the order of their disbursement, and should inflation be taken into account when disbursing zakat for past years?

It is not permissible to delay Zakat or deposit money in usurious banks. One must repent, pay the missed Zakat, withdraw funds from usurious banks, and offer expiations. Zakat for past years must be paid based on the closest possible estimation, and debt is not deducted from Zakat. Zakat is obligatory on invested capital and its lawful profits. If there is a difficult choice between Zakat and expiations, Zakat takes precedence. However, if Zakat and debts conflict, immediate debts take precedence over Zakat, and Zakat is postponed until one becomes able.