Use the following information for the next two items: For the years ended December 31, 2018 and 2017, the following data were presented to the management of Jolegend Company: Sales Cost of Sales Gross Profit 2018 2017 P1,250,000 776,000 P1,363,000 911,800 P 451,200 P 474,000 The management requested you to determine the cause of the decline in gross profit on sales despite of the favorable information given by the Sales Division that the quantity sold in 2018 was higher in 2017 and that the production costs in 2018 were lower than that of 2017 by 6%. Based on the information above, answer the following: 1. The percentage change in volume is 2. The increase (decrease) in net sales due to price factor is B