COMMAND:heal(playerid, params[])
{
    new Price, Float: PlayerHealth, string[64];
    GetPlayerHealth(playerid, PlayerHealth);
    Price = 100 - PlayerHealth;
    SetPlayerHealth(playerid, 100);
    GivePlayerMoney(playerid, -Price);
    format(string, sizeof(string), "You have been healed. You payed %d.", Price);
    SendClientMessage(playerid, GREEN, string);
    return 1;
}

Price = floatround(100.0 - PlayerHealth);