Selling bonds. Lunar Vacations needs to raise $$6,500,000$ for its new project $($a golf course on the moon$).$ Astro Investment Bank will sell the bond for a commission of $2\mathrm{.}5\%.$ The market yield is currently $7\mathrm{.}5\%$ on twenty$-$year semiannual

bonds. If Lunar wants to issue a $6\mathrm{.}4\%$ semiannual coupon bond, how many bonds will it need to sell to raise the $$6,500,000?$ Assume that all bonds are issued at a par value of $$1,000.$

How many bonds will Lunar need to sell to raise the $$6,500,000?$

$($Round to the nearest whole number.$)$