If you are depositing an amount (equal to your SAP#) each year for the next 50 years

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Question:

If you are depositing an amount (equal to your SAP#) each year for the next 50 years at an annual compound rate of 1LDS (where LDS is your last digit of sap, i.e. SAP 2345 will have an interest rate of 15). What will be the account worth after 50 years? Sap id = 3126