Default Pricing in PR00 condition

Question

This is in MTO Quotation Process.....
1.EK01 and Markup are the 2 ITEM condition types which we use without any condition records.
.In pricing procedue
1.STEP-1--EK01 is the cost which reads from UNIT COSTING of the Particular Item.++
2.Step-2--Markup will be applied based on customer and material.++
3. Step-3--Cost + Markup++
4.Step-4ZP00 is the condition type the value of step-3 which populates to condition value field-which is =EK01 + Markup and it is statistical condition type and cannot be edited manually.++
5.Step-4Pr00 priceNow our requirement is that , ZP00 value should be defaulted as our basic price PR00 and if there is no value in ZP00 condition line then it should take ZERO, where in user can enter it manually.
6. This is alternative condition type formulae which has been assigned for ZP00 condition type.
Price difference (WWS)
form frm_kondi_wert_012.
  if xworkd ne 0.
    xkwert = xworkd - xworke.
  else.
   xkwert = 0.
  endif.
endform.+Can we write Alternative condition type and assign it to PR00 condition in Pricing procedure...saying that Condition value of ZP00 to be flown to PR00 condition, if no value found make PR00 as Zero.
In such case what are the tables i have to consider to tell to my ABAPER and what prcautions i have to take.

Answer 1

I like to suggest below;
1) Remove the statistical check assignment for the condition type ZP00. This means you need to assign the account key similar to PR00.
2) Then assign the step number of ZP00 in the from column for the condition type PR00.
I assume this should pull the value. Since ZP00 and PR00 are assigned before gross value and PR00 comes after ZP00, the system will always consider the PR00 value.
I am just curious, why you need ZP00? Instead you can have PR00 and you can assign the same routine to PR00. I think this is simplest and easily manageable.
Regards,