Danner Corporation reported net of $$600,000$ and $$780,000$ and $$780,000$ in the years $2013\mathrm{.}2014$ and $2015.$ respectively. If $2013$ is the base year, what $\%$ do $2015$ sales represent of the base?

a$.115\%$ b$.130\%$

c$.77\%$

d$.30\%$