Is this Racist?

A Train From Caltrain Station. The Tiny Cone Says "Sh*t Happens"

I was only able to take one photo because Khay and I got kicked out of the tracks. :[!

Find Khay!

I was born in the philipines but moved here to San Francisco when I was 1 years old. When one of our assignments in ETHS 210 was to write about a time when I got discriminated agianst, or somthing racist happen, I couldn't think of anything. Although, throughout working at this cafe I feel like people are being ractist towards me, but indirectly...

So Khay and I work at this cafe called " Tazza De Amore" in the Caltrain Station on Kings street. While I work at the cafe, I often feel looked down on by many Caucasians. For example, there was this one time when there were two caucasian woman approcaching the cafe. They seemed to be enjoying themsevles.. laughing and what not. Then when they came came close enough to order, I smiled at them and there faces turned straight and moodless. I asked them
"what can I get for you today?"( I'm still smilling!) and they said "two lattes...".
"Anything else for you?" I said
Then the lady who was ordering said,"No."
Then one of the ladies started searching in her purse for her wallet.
Somtimes the screen thats facing towards, which tells the total amount they owe goes out. So I just got myself into a habit of telling customers how much whatever they're buying costs.
Once I told them the total, the lady with the money didn't even look at me, she just looked to the side ( she wasn't looking in her purse, at her friend, or anything else) and handed me the money.

These types of incidents occur inevitably every time Khay and I work there. Khay and I talked about this and remembered how while working with our co-worker, who is Caucasian, she never seems to run into any rude Caucasian customers as Khay and I do. I am not sure what it is , Racist or what, but I do feel some sort of vibe that it is somthing like it. Is it?