请教数学

a certain business produced X rakes each month from Noverber through February and shipped X/2 rakes at the begining of each month form March through October. The business paid no storage costs for the rakes form november through february, but it paid storage costs of  0.01 per rake each month form march though october for the rakes that had not been shipped. in terms of X, what was the total storage cost, in dollars, that the business paid for the rakes for the 12months form november through october?

0.40X

1.2X

1.4X

1.6X

3.2X