For this investment, P1 has sent you {{group.sent_amount}}, which has been tripled to become {{tripled_amount}}.
So, the total money in your account for this round is {{total_amount}}, the sum of {{tripled_amount}} from P1,
and {{Constants.endowment}} from the investor. You can send to P1 either TK.0, {{tripled_amount}}, or any amount
in between TK.0 and {{tripled_amount}}. Remember you lose whatever you send to P1 and it becomes part of P1's money.