1. Go to this calculate.js page and copy all the code. Below is the screenshot for the code.
2. Login to Shopee, bring cursor on your profile icon. Click on My Purchase. Now, you are in "All" tab.
3. Right click anywhere in the page using your mouse. Choose Inspect. Click Console tab.
4. Paste the code you get from Step 1 at the bottom of Console tab.
5. Press Enter on your keyboard. Wait for the process to complete and it will show total amount you have spent.
