Condition type wise order quantity change

Hi Experts,

Sales Order is created in One line item with some quantity but the price quantity should be changed in condition type wise.

For Example

Suppose for 10 quantity in a line time and there are 2 condition type

PR00 Rs.100 per Unit i.e 100x10=1000

ZPR0 Rs. 20 per Unit i.e. 20x8= 160 (instead of 10 quantities the system can allow for 8 quantities in same line items)

i tried to solved but i couldn't it. Kindly reply me as possible.

Regards,

Chakradhar