Sierra borrowed $$300,000$ at $6\%,$ on a $30$ y back in $2007.$ It so happens her payments were $$1,798\mathrm{.}65.$ In $2020,$ she refinanced into a ${?}^{**}15$ year mortgage$*$ at $3\%.$ Assuming she made exactly $150$ payments $(12$ and a half years$)$ before refinancing, what are the PAYMENTS on her new $15y$ loan?