Split my fields into multiple fields in my financial projections spreadsheet

I have a spreadsheet for making projections for financials. This includes acquiring customers, number of accounts customers create and how much they pay for each account every month. This is a very detailed sheet. The fields in blue background are the ones that we allow the customer to edit and the fields in white background are the ones who have formulas to calculate values automatically (using the fields in blue background). There are two fields that I want to split. Account per paid customer per month: It assumes that the paid customer will create all of his accounts within the first month. But in reality, he will spread creating his accounts over the period of coming months So we need to split this field into: Accounts created per paid customer 1st month. (number of accounts each paid customer who was aqcuired this month creates this month) Accounts created per paid customer 2nd month. (number of accounts each paid customer who was aqcuired this month creates next month) Accounts created per paid customer 3rd month. (number of accounts each paid customer who was aqcuired this month creates the month after next) Accounts created per paid customer 4th month. (and so on) Accounts created per paid customer 5th month. (and so on) Price and Costs per account: This field should be two fields for each month. Revenue per new account (revenue for per account this month for new accounts created this month) Revenue per existing account (revenue for this month for old existing accounts created before) These updates should be placed into spreadsheet in such a way that the other fields which are calculating by using values from these fields are also updated. So that we don't break anything. You should be available to start work on it and finish it asap. Previous experience with spreadsheets is necessary.