A $3\mathrm{.}75$ percent TIPS has an original reference CPI of $183\mathrm{.}9.$ If the current CPI is $214\mathrm{.}7,$ what is the current interest payment? $($Assume semiannual interest payments and a par value of $$1,000.)$

Multiple Choice

$$43\mathrm{.}78$

$$37\mathrm{.}50$

$$21\mathrm{.}89$

$$18\mathrm{.}75$