Kangaroo Autos is offering free credit on a new $$15,000$ car. You pay $$300$ down and then $$490$ a month for the next $30$ months. Turtle Motors next door does not offer free credit but will give you $$1,140$ off the list price.

a$.$ If the rate of interest is $0\mathrm{.}83\%$ a month, calculate the present value of the payments to Kangaroo Autos. $($Do not round intermediate calculations. Round your answer to $2$ decimal places.$)$