Dale purchased a retirement annuity paying $1800 every 6 months for 20 years. If interest is 4.6%

Question:

Dale purchased a retirement paying $1800 every 6 months for 20 years. If interest is 4.6% compounded monthly, how much did Dale invest in the Annuity
An annuity is a series of equal payment made at equal intervals during a period of time. In other words annuity is a contract between insurer and insurance company in which insurer make a lump-sum payment or a series of payment and, in return,...