A perpetual inventory system gives a continuous record of the amount of inventory on hand. O a. False O b. True A company has net sales and cost of goods sold of $752,000 and $543,000, respectively. Its net income is $17,530. The company's gross margin is and operating expenses is O a. $525,470; $227,000 O b. $209,000; $191,470 C. $191,470; $209,000 d. $227,000; $525,470