Are there costs for importing items from China shipped in large quantities by sea?

Hello there. I am manufacturing and importing plastic acrylic cases from China. There will be about 100 cases that are 13×13x2.5 inches. I have already received a quote from the company for the 100 cases and shipping by sea to Los Angeles (where I am located). I am wondering if anyone knows of and can inform me of any other fees I may not be expecting. I would have to go to a Los Angeles or long beach port and pick the items up with a truck and am wondering if anyone knows whether or not I’ll be charged any importing fees or taxes when I try to pick them up… Literally any fees at all. I’m new to this.