please answer all the questions

In performing a vertical analysis, a 13% increase in net sales combined with an 9% increase in total expenses will cause profit to O a. increase by 4% O b. decrease by 13% Oc increase by 13% O d. decrease by 4% Wesgate Furniture Ltd. has provided you with the following selected information from 2018 and 2019: 2019 2018 Sales $785,000 $740,000 55,200 52,000 Sales returns and allowances Cost of goods sold Operating expenses Profit 358,000 305,000 285,000 255,000 86,800 128,000 Using a vertical trend analysis with net sales as a base, which of the following most accurately depicts the information stated above? O a. Profit as a percentage of net sales did not change significantly from 2018. O b. Profit as a percentage of net sales decreased by 6.7 percentage points. Oc Cost of goods sold as a percentage of net sales decreased by 5 percentage points, Od. Cost of goods sold as a percentage of net sales remained consistent from 2018