dear Sir,

kindly clarify me that the same numbers with different descriptions,
quantities and unit prices, i want keep dat's one ref number with other
data's any one.
like
1701012 HOUSING REAR 3
1701012 HOUSING REAR part 4
1701012 HOUSING REAR 2
1701012 HOUSING REAR p 5

i need to make like this
1701012 housing 14

please help me to learn more about this function.