Addison, Inc. uses a perpetual inventory system. The following is information about one inventory item for the month of September: \begin{tabular}{rll} Sept. 1 & Inventory & 20 units at $20 \\ 4 & Sale & 10 units \\ 10 & Purchase & 30 units at $25 \\ 17 & Sale & 20 units \\ 30 & Purchase & 10 units at $30 \end{tabular} 69. Use the information for Addison, Inc. If Addison uses LIFO, the cost of the ending merchandise inventory on September 30 is a. $800 b. $650 c. $750 d. $700