NA is describing an Indian custom around the amount of money you should give a gift. 

NA: There is also like when you give gifts, you don’t give like 50 or 100. You give like 51 or 101. It can be any hundred amount, but it can’t be like a ten is has to end in one. 

C: Is it related to luck or anything like that?

NA: I guess it’s so like that, Indian people see it as, when I give you 100 it’s like a hundred full stop. When you do 101 it is like money will keep coming to you. 

Context

NA is a 20 year old USC business student who comes from a Sindhi Hindu family from India. She grew up in southern California as an active Hindu going to temple and fasting on Mondays and active in her Hindu tradition. She is also my roommate and I asked her about folklore she had related to her Indian background.  This information was taken from a casual interview conducted with NA over Facetime. 

Analysis

One explanation for addition of the $1 is that it represents the continuation of wealth. It also makes the gift more meaningful by showing the recipient that not only are they providing money but also a blessing of the sort for you to be more successful in the future. Thus, making a gift that may seem somewhat impersonal more meaningful. I also found a tradition of giving a single Rupee coin when a larger monetary amount is not given. Thus, showing an aversion to the finality and absence the number zero represents. In contrast to the potential form growth represented through the number one. Additionally, even though zero comes before one, one is the number we start counting with. As a result, the giving of a Rupee coin is often giving on occasions that represent new beginnings, such as a wedding