split items in the sales order while creating work

I am trying to split my items in the sale order with units when creating work.

i need to create two works from one sales order differentiating with units and i am working on AX 2012

EX: SO contains three items ,  item 1:  1233 -------- box (units)

                                                 item 2:  1234 ------ EA (Units)

                                                 item 3: 1235-------- BOX (Units)

so now user create load for complete sales order , but when he create work he need to get two work ID's

                                               workid 1:    item 1 BOX

                                                                 item 3 BOX

                                               workid 2:  item 2( EA)

output should be the BOX units in one work and EA in one work