People (groups) on road trips tend to take turns paying expenses. At the end of the trip they calculated the distribution of expenses to record each individual's expenses, debts and receivables between individuals. To calculate expenses and accounts payable between individuals, we will collect expense bills. Then record the spending of individuals from these bills. After everything is calculated, between individuals will make payments according to the final calculation results. When performing calculations, they must ensure that the calculations are correct and detailed.