For payments that are made at intervals greater than monthly divide through the number of months from the interval (eg. for electricity bills that come each and every quarter, divide the amount paid last quarter by three to get the Average monthly.) As far as "for every X" goes, https://financefeeds.com/how-dogecoin-doge-holders-can-maximize-their-returns-through-bjmining-cloud-mining-in-2025/