Service tax levied by restaurants on totally food bill ?

Hi Friends,

I would like to know whether Service Tax amount on Food items levied on Services charges or Total Food items.

I could not understand the above clarification.  Because I come to know that service tax is levied on service charges only.  But some hotels and Restaurants will levy service Tax on total food items.

My Query:

1)  Why should they mention Service charges if they have collected Service Tax on Total Food item

2)  And also they collect VAT on the Total Food item.

I am herewith attaching bill which I recently purchased some food items.

Regards

Sreenivasa Rao B