CP 6-9 The records of Renault Corporation showed that sales during the period were $276,000, Opening inventory amoured to $26,000 at cost, Purchases were $90,000 at cost. The company paid $4,000 for transportation-in. Mark-up on all items sold is 300%. Required: 1. Calculate: a. Cost of goods available for sale at retail b. Cost of goods sold at retail- c. Ending inventory at retail d. Ending inventory at cost e. Cost of goods sold at cost f. Gross profit at cost. 2. Demonstrate that your results maintain a 300% mark-up.