Hello everyone,I want to design a study on Qualtrics. In the study, participants will be allowed to spend the income they earned in previous stages. There are 8 spending options given to participants. I used branch logic in the stage of deducting the expenditure from the net income. However, it did not work completely. I am open to suggestions on this issue.Thank you in advance.Best.

You could use JS inside a matrix constant sum question.Here’s the demo:https://iima.au1.qualtrics.com/jfe/preview/previewId/00a1841e-33a5-49ae-a9c5-6934da853af4/SV_8HBDY4VRJnFn40J/BL_eWhyLPGnUXT8onQ?Q_SurveyVersionID=currentQualtrics.SurveyEngine.addOnReady(function () {const quest = this;const qc = quest.getQuestionContainer();// Pipe your max amount hereconst maxAmount = parseInt("500");const alertText = "Please ensure the amount consumed is less than";const nextButton = document.querySelector("#NextButton");// Add a row below the total rowconst totalRow = qc.querySelector("tr.CSTotal");const remainingRow = totalRow.cloneNode(true);totalRow.insertAdjacentElement("afterend", remainingRow);// Give them total rows new labels for claritytotalRow.querySelector("th").innerHTML = "Amount Consumed";remainingRow.querySelector("th").innerHTML = 'Amount Left <small id="amountAlert" style="color: red;display:none;">+++++ $ _____.</small>';const totalInput = totalRow.querySelector("input");const remainingInput = remainingRow.querySelector("input");// Monitor changes to the totaltotalInput.oninput = function () {setTimeout(() => {const amountUsed = parseInt(totalInput.value.replaceAll(/\D/gm, ""));const amountLeft = maxAmount - amountUsed;// Update the remaining total with the amount leftremainingInput.value = amountLeft;// Hide next button if amount consumed is more than available// Show the alert message in this caseif (amountLeft < 0) {nextButton.style.display = "none";alertMessage.style.display = "block";} else {nextButton.style.display = "";alertMessage.style.display = "none";}}, 0);};// Start with the entire amount being availableremainingInput.value = maxAmount;// Put values in the alert messageconst alertMessage = qc.querySelector("#amountAlert");alertMessage.innerHTML = alertMessage.innerHTML.replace("+++++", alertText);alertMessage.innerHTML = alertMessage.innerHTML.replace("_____", maxAmount);});

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