Please put the the answers in =A7*B7 and not just the number (7)

Better Bottles, Incorporated uses a periodic inventory system and has provided its current inventory information. The Controller has asked you to prepare a comparison of the Ending Inventory and Cost of Goods Sold totals for three different inventory costing methods: Periodic FIFO, LIFO, and Weighted-Average.
Description	# of Units	Cost per Unit	Total Cost
Beginning Inventory	20	$20.00	$400.00
January 15 Purchase	27	22.00	594.00
January 20 Purchase	33	30.00	990.00
Goods Available for Sale	80		$1,984.00
Less: January Sales	36
Ending Inventory	44
Here are some tips for using Excel:
Cell Reference:	Allows you to refer to data from another cell in the worksheet. If you entered =B5 into a blank cell, the formula would output the value from cell B5.
Basic Math Functions:	Allow you to use the basic math symbols to perform mathematical functions. You can use the following keys:+ (plus sign to add), - (minus sign to subtract), * (asterisk sign to multiply), and / (forward slash to divide). For example, if you entered =B4+B5 in a blank cell, the formula would add the values from those cells and output the result.
SUM Function:	Allows you to refer to multiple cells and adds all the values. You can add individual cell references or ranges. If you entered =SUM(C4,C5,C6) into a blank cell, the formula would output the result of adding those three separate cells. Similarly, if you entered =SUM(C4:C6), the formula would output the same result of adding those cells.
Required:
1. Calculate both the Ending Inventory and Cost of Goods Sold using Periodic FIFO.
(Use cells A4 to D10 from the given information to complete this question.)

4. Use the given information and your calculated numbers to complete the Cost of Goods Sold Equation below for all three inventory methods. (All numbers should be positive.)