Answer:
You didn´t attached the records demanded by the exercise, so I try to figure it out which were useful for the purpose. Any question, please ask.
Step-by-step explanation:
- Revenue = Number of unit sold x selling price per unit 
 
= 500 x 1.5 
 
= 750 
-  Discount = Revenue x Discount percentage 
 
= 750 x 1% 
 
= 7.5 
-  Cash = Revenue - Discount 
 
= 750 - 7.5 
 
= 742.5 
 
- Cost of goods sold = Number of unit sold x cost price per unit 
 
= 500 x 1 
 
= 500