How much is a Thank You worth ???

Just two weeks back , my father’s employer , who at times treats me like a friend when we are engaged in a general conversation and vice versa , loss his mother due to old age . Old age I say is because she was 94 years old and has already lived her life to the fullest . Unfortunately , I was unable to attend the funeral held the very next day after she passed away because it was a working day and the funeral was held in another state ( hometown ) hence my absence . I hope it was not much of an issue to him to notice if I was ever present at the wake or the funeral service but my father of course being an employee , made his way to the hometown of his employer to pay his last respect . Somehow rather , I felt a guilty sense inside of me because I was unable to be present at the wake physically . Hence , in order to make up for my absence I decided to sent in a condolence card together with a small contribution $$$ ( something normal that is usually practise in my culture whenever we attend a funeral as a way of voluntary contribution towards funeral and other incurred expenses ) . I managed to pass this envelope containing the card and $$$ not to him personally but rather placed it at his office table via my dad . It’s been exactly two weeks now , not even a word or emel or sms of thanks ! I truly understand his present situation being a person of authority and respected individual within the community but I’m sure a sms of thanks does make a whole lot of difference to me – ME - a no one rather than he pretending of not receiving any at all ! What’s wrong with people these days ??? Or is this just due to mere ignorance ? It’s just like the ungrateful craving for undivided attention and somehow successfully gained it but at the end , it was I who ended up hurting ( and losing my $$$ in the process – stupid me ! ) . By the way , this is not the first time such an event has happened . Many other civilized or should I just say ‘ educated human beings ‘ have failed to acknowledge or be thankful / grateful for what they have receive , obtained , achieved or been blessed with either from another individual or from a group . Oh and before I forget , there’s another ungrateful human being in the office – the place where I work , who just returned to work after being away for two month on maternity leave and as usual , the department ( meaning $$$ from other staff’s pocket & including mine ) contributed a cash gift towards the birth of her child . And this bitchy character also have failed to acknowledge a word of thanks for the gift contribution made !!!
Now you tell me ! how much indeed is a Thank You worth ? I guess I’ll have to think not twice but maybe think it over a few times before I make any gift or cash contribution to someone whom I think will appreciate it sincerely .