Please help solve

01 -Nov 05-Nov 11-Nov 21 -Nov Beginning Inventory Sale Purchase Sale 40 units @ $5 each 30 units 50 units @ $6 each 35 units This company employs the periodic method of accounting for its inventory. Please respond to the following items: a) What is the total number of "available for sale" units during the month of November? b) What is the Cost of Goods Sold for the month of November using the "First-In-First-Out (FIFO)" cost flow assumption? c) What is the Ending Inventorp for the month of November using the "Last-In-First-Out (LIFO)" cost flow assumption? d) What is the Cost of Goods Sold for the month of November using the "Weighted- Average" cost flow assumption?