Issue regarding DIP profile

Hi experts,

I am facing one issue regarding DIP profile,we are in service related project in which,we are using DP90 tcode,from which it is creating Debit memo request,my question is

1)The cost of the material and labour which is used in service order it is getting in to debit memo request (sales order) with the quantiy and cost,it is picking the materials price from material info record and labour cost from activity type,in to DBR,how the price is fetching from material info record in debit memo request,where is the link for this?

2)In service order,in operations tab we are assigning some activities,which will reflect in to DBR,here we have two types of contracts for both this, activities were used,but my issue is for type-1 the activity type as labour we used its rightly appear in DBR with the cost and hours, but in type -2 i need the activities which has been used but price should not come in to DBR for type 2,this is very critical issue,can any one guide me regarding this.