New answers tagged field-update
0
Based on your updated question, isn't it as simple as:
public static void myFunc(val1, val2){
myObj.Field1__c = val1 == null ? myObj.Field1__c : val1;
myObj.Field2__c = val2 == null ? myObj.Field2__c : val2;
}
(Ignoring the fact this isn't a valid apex method as your parameters aren't typed)
1
Actually I don't think. You need Workflow rule for this. Hope you can get Customer_Budget__c and Unit Price values via manually. So Please use formula function to achieve this,
For Quantity field formula will be,
Customer Budget / Unit Price
For Total field formula will be,
Quantity * Unit Price
For Remainder Amount field formula will be,
...
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