Question $27(1$ point$)$ In June, Blackfly Ltd$.$ received a $$5,000$ cash payment for work billed the previous month. The company replanted a clear$-$cut area of northern Alberta for which it sent out an invoice for $$20,000.$ At the beginning of the month the company had $$1,000$ of trees for planting. During the month the company purchased $$4,000$ more, and at the end of the month it was left with trees that had cost $$500.$ The company's expenses were $$1,000$ in rent for its office and $$3,000$ in other expenses. Amortization on the truck and office equipment was calculated to be $$500.$ The income tax rate is $10\%.$ The cost of goods sold for Blackfly Ltd$.$ for the month was O a$)$ $$5,000$ Ob$)$ $$4,500$ O c$)$ $$4,000$ O d$)$ $$3,500$