Taarak Mehta Ka Ooltah Chashmah S01 E210 Sundarlal Helps Tappu Sena

"Problems Toh Hain Sabke Saath, Bas Nazariye Ki Hain Baat!"

Sundarlal visits Jetha's place and decides to help Tappu Sena regarding a financial matter. What is this favor that makes Tappu Sena jump with joy?