Excess Inventory and Charges

A few of my listings got flagged when I first started so I was not able to advertise them. (MILF Jigs) The following products, I put Man I love Fishing in the title and was able to advertise without problem. Sales have been great on those and I sold out of most colors. I have just passed the 3 month on the hurting SKUs mark so it is showing excess inventory. When will I start to be charged storage? What is average price to be destroyed or sent back to me?

Thanks in advance.