How to say “Before you update the prices on the price board, let me confirm what we're charging for a wax.” in Japanese

In Japanese

料金表(りょうきんひょう)の料金(りょうきん)を変(か)える前(まえ)に、ワックスがけの料金(りょうきん)を確認(かくにん)させて。

Ryōkinhyō no ryōkin o kaeru mae ni, wakkusu gake no ryōkin o kakunin sasete.

Before you update the prices on the price board, let me confirm what we're charging for a wax. in other languages