[原创]兄弟姐妹有道题，谁来帮我解一下？

这题 我鼓捣了半天，晕掉了，哪位帮我分析解一下，跪谢！！

A certain business produced x rakes each month form November through February and shipped x/2 rakes at the beginning of each month from March through October.  The business paid no storage costs for the rakes from November through February, but it paid storage costs of $0.10 per rake each month from March through 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 12 months form November through October?