The fastest way to start a fight is to erase yesterday and write a new total. If they owed 200 and you sold 50 more, add 50. The book should still show the 200. When they pay, add a payment so the total comes down. If the number goes up after a payment, you marked it the wrong way.
Two buttons, one meaning
In Kaymn, Receivable means they owe you more. Payable means the balance moves the other way — you owe them, or they are paying down what they owed. The customer still reads their own statement, in their currency. Your dollar total is for you.
Try Kaymn for 7 days — kaymn.net, not kaymn.com.