Psychological number strategy, are they really needed?

are you ever see this kind advertising? sell $24 by now only $23.98 you can save two penny. or this kind? price $24 we save 2 penny for hunger children!

are this really needed?

in the fact is yes, as a consumer if i can save two penny and i bought it 100 pieces i will save $2 but in the second term the charity can also be an attractive strategy to take peoples hearts.

The fact!

peoples will search for substitute goods for a reason and they are :

they gonna search for a substitutes that cheaper and have the same quality, atleast.
they gonna search for the taste they like.
they gonna search for the trend.

so the psychological strategy can always use but the time for using this strategy will effect to.