Translator Reviews ( Japanese → English )

Japanese

アマゾンから送られてくるSeller Fee Tax Invoiceに関して質問です
Price　(excl. VAT)欄の金額が全てのアマゾン手数料でVATがそれに掛かった税金という事であっていますか？つまりTotal priceの合計が私がアマゾンに支払った手数料ひと月の総額という事ですか？

１ヶ月にインボイスが２通届いてる事がありますがこれは何故ですか？例えばインボイスナンバー１と２
また１２月度は１通のみでしたがこれは何故ですか？
それぞれのインボイスの違いを教えて下さい

English

This is an enquiry regarding the Seller Fee Tax Invoice from Amazon. Does the amount written in the column "Price (excluding VAT)" includes all service charges of Amazon and "VAT" taxes? So in order words, the Total price includes the monthly total and service charge which I have to pay to Amazon?

And what is the reason for getting 2 invoices in a month? For example Invoice number 1 and Invoice number 2.
Moreover, in the past, it had been just 1 invoice for a 12 months period.
Please advise what is the difference between the two types of invoice.