During recent stay at Zostel (Backpacker Hostel), Pushkar, I inquired about the laundry (per cloth with ironing) rate list which was as follows:

T-Shirt/Shirt – Rs. 25

Trousers/Jeans – Rs. 25

Undergarments – Rs. 20

All you have to do is inform the reception about the laundry available and they will inform the laundry wala who will arrive and pick up your laundry and return it after cleaning and ironing after 24 hours.