$6-$Paola buys her house for $$50,000.$ Years later she sells it for $$319722.$ Assuming there are no improvements during their tenure or selling costs and Paola is single, how much of their capital gain income $($profit from selling the house at a higher price than the original purchase price$)$ is taxed according to the US tax system? State your answer as a number rounded to the nearest cent $($e$.$g$.$ if you get $$13\mathrm{.}57654,$ write $13\mathrm{.}58)$

$7-$ You want to purchase an office building. The property contains $9190$ square feet of rentable space and is currently occupied by multiple tenants, each with a recently renewed long maturity lease. The annual rent in the $1$st year of ownership is $$6/$sq ft$.$ The vacancy rate is $6\mathrm{.}5\%.$ You expect to incur collection losses $($from tenant bankruptcy$)$ on $1\mathrm{.}5\%$ of the square feet during your first year. What is the Potential Gross Income $($PGI$)$ for the first year? State your answer as a number rounded to the nearest cent $($e$.$g$.$ if you get $$13\mathrm{.}57654,$ write $13\mathrm{.}58)$