Annuity due.Reginald is about to lease an apartment for 12 months. The landlord wants him to make the lease payments at the start of the month. The monthly payments are $1,600 per month. The landlord says he will allow Reg to prepay the rent for the entire lease with a discount. The one-time payment due at the beginning of the lease is $18,286. What is the implied monthly discount rate for the rent? If Reg is earning 0.7% on his savings monthly, should he pay by month or make the one-time payment?

I have literally no idea how to do this. Everything I've tried has been incorrect. I would like to know how to do it with a formula, as my financial functions on my calculator are not easy to figure out.