When calculating LIFO using the retail inventory method, if price levels have increased by 8% since the beginning base level, what does that mean? Does that mean that only Cost of Beginning Inventory, Cost of purchases, Retail Beginning inventory, and retail Purchases should be increased by 8% before calculation of the cost to retail ratio or that Cost of Beginning Inventory, Cost of purchases, Retail Beginning inventory, retail Purchases, Net Markups, Net Markdowns, and Net Sales should all increase by 8% before calculation.