Answer:
January cost $702,200
February cost $812,200
March cost $950,400
Total Purchase cost    
Particulars                     January	February  March
Purchase cost of blades	$ 207,200.00	$ 227,200.00	$ 230,400.00
Purchase cost of motor	$ 495,000.00	$ 585,000.00	$ 720,000.00
                                         $ 702,200.00	$ 812,200.00	$ 950,400.00
  	
Explanation: 
R.M budget - blades    	
Particulars  January	February	March	April
Planned production  11000	13000	16000	12000
Blades req. per unit  4          4                 4                      4
Material req. for prod.	44000	52000	64000	48000
Add:	Desired ending inventory	20800	25600	19200	0
Less:	Beginning inventory  13000	20800	25600	
Net units of blades req.	51800	56800	57600
 
Cost per blade  $             4.00	$             4.00	$             4.00	
Purchase cost of blades	$ 207,200.00	$ 227,200.00	$ 230,400.00	
R.M budget - motor    	
Particulars  January	February	March	April
Planned production  11000	13000	16000	12000
Motor req. per unit  1	1	1	1
Material req. for prod.	11000	13000	16000	12000
Cost per motor  $           45.00	$           45.00	$           45.00	
Purchase cost of motor	$ 495,000.00	$ 585,000.00	$ 720,000.00