6. The income statement of B company for the year ended March 31, 1992 are as follows: (in millions of pesos) 1992 1991 Sales 320.5 305.4 Cost of sales 274.1 253.9 Gross profit 46.4 51.5 Distribution costs 11.6 10.4 Administrative expenses 22.6 23.5 Other operating income 4.5 6.4 Earnings before interest and taxes 24.0 Interest charges 1.9 Earnings before taxes 14.8 19.7 16.7 4.3 Which one of the following conclusions is correct? a. The company sold more goods by volume in 1992 than in 1991. b. The gross margin, as a percentage of sales, was higher in 1992 than in 1991 The increase in distribution costs in 1992 over and above the 1991 amount is due to the higher sales tumover d. The net profit margin, as a percentage of sales, fell in 1992 to about 2/3 of its 1991 level. C