It's ok if you split the participation fee between the two of you.
参加費 participation fee
2人で between the two of you
折半して split
構いません it's ok
例文 It's ok if the two of you pay 500 yen each.
「2人で500円ずつ払ってもOKです。」
例文 Please decide between yourselves.
「2人で決めて下さい」
ご参考になれば幸いです。
You can both split the participation fee or have one person pay it, any option is OK.
You're free to either split the participation fee or have one person pay the total amount.
1) You can both split the participation fee or have one person pay it, any option is OK.
"参加費を折半しても、一人が払うこともできます、どのオプションでも構いません"という意味です.
2) You're free to either split the participation fee or have one person pay the total amount.
"参加費を折半しても、一人が合金を払うことも自由です"という意味です.
オーストラリア 
モロッコ 
