$15-$Angelica wants to take out a $$3901$ Adjustable Rate Mortgage. She is offered a $30$ year, $3/1$ ARM with an initial teaser rate of $2\mathrm{.}6\%.$ The reset margin on the loan is $300$ basis points above $1$ year CMT$.$ What will be Angelica's monthly mortgage payments during the first three years with this mortgage? State your answer as a number rounded to two decimal points $($e$.$g$.$ if the answer is $$2345\mathrm{.}123,$ write $2345\mathrm{.}12)$