On March $1,$ Lindsay Co$.$ sold inventory on account for $$710$ with $"\frac{2}{10},\frac{n}{30}"$ terms of

sale. Lindsay Co$.$ uses the perpetual approach to account for inventory. The cost of the

inventory sold was $$355.$ This is a mark$-$up on cost of $100\%($ $$355$ cost plus $100\%$ of $$355$

cost equals $$710$ selling price$).$ On March $7,$ goods with a sales price of $$10$ were returned to

Lindsay by a buyer since they were the wrong color. Buyers paid Lindsay Co$.$ the full

remaining amount owed on March $9.$ What was the gross profit on the inventory sales?

a$.$ $$335\mathrm{.}80$

b$.$ $$350\mathrm{.}00$

c$.$ $$336\mathrm{.}00$

d$.$ $$331\mathrm{.}00$