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November 10, 1659
summary thank wikipeda :
The Battle of Pratapgad was a battle fought on 10 November 1659 at the fort of Pratapgad near the town of Satara, Maharashtra, India between the forces of the Marathas under Shivaji and the Adilshahi troops under the Adilshahi general Afzal Khan. The Marathas defeated the Adilshahi forces.
Basic problem!
So every week he receives $7. This is then added to his total every week. So in 4 weeks, this means he has added 7+7+7+7, also known as 7x4. This results in an answer of $28 after 4 weeks!