In its first month of operations, Literacy for the Illiterate opened a new bookstore and bought merchandise in the following order: $(1)300$ units at $$5$ on January $1,(2)450$ units at $$8$ on January $8,$ and $(3)850$ units at $$9$ on January $29.$ Assume $1,000$ units are on hand at the end of the month. Calculate the cost of goods available for sale, cost of goods sold, and ending inventory under the weighted average cost flow assumptions. Assume perpetual inventory system and sold $600$ units between January $9$ and January $28.($Round your intermediate calculations to $2$ decimal places.$)$