Answer: Hello your question has some missing information hence i will provide a more general question within the scope of your question
answer :
Revenue = Selling price - Direct cost
Input the values for the different months that you have into the relationship above
Explanation:
Gross margin is the revenue retained from company sales after the deduction of direct costs involved with the production of goods and services been sold.
The relationship between Revenues and cost of sales using Gross margin analysis
Revenue = Selling price - Direct cost
Input the values for the different months that you have into the relationship above