[Typo3-shop] making price for differnt quantties in tt_products

[Borut Rozman]

My customer wants to have option in his shop and doesnt want to fix template
by him self with this
he wants like this
for 1 price is 1?
for 6 price is .9? / peace
for 12 price is .8? /peace
for n price is .x /peace

so he wants allso to select quantity and price / peace in backend. Can this
be easily done or we should somehow reprogram the tt_products