Whoa whoa wo! I know you are from Japan, but let's not Jab that hard. Over charging is one thing, but charging the appropriate price for negligence is another.
That would go under the Modern Gold tier (gold coins 1965 to date with value under $3000) Grading fee would be $30 + $10 handing fee + $31.45 for Priority shipping to return it + whatever you pay to ship it to them. This would be if you sent them just the one coin. If you send more then one the handling fee and the shipping cost gets spread out over all of them. So you sent one coin it costs $71.45 per coin, you send five coins it costs $38.25 per coin.