Meaning of Column in Pricing Procedure

What is the meaning of this column in the pricing procedure ,i.e 
  
1. STEP 
2  CTRSTEP 
3. CTYP 
4. DISCRIPTION 
5. FROM 
6. TO 
7. MAN 
8. Mand 
9. STAT 
10. PRINT 
11. REQUIREMENT 
12. ALCTYP 
13. ALBCTYP 
14. ACKEYS 
15. ACCRUALS

A. STEP 
This indicates the number of step-in the procedure. 
B. COUNTER 
This is used to show a second ministep 
C. CONDITION TYPE 
This is the most important component in the pricing procedure. The rates are picked up from this element, on the basis of the properties described. 
D. DESCRIPTION 
This forms the description of the condition type. 
E. FROM 
This is used to define the progression of the calculation and range of subtotals 
F. TO 
This is used to define the progression of the calculation and range of subtotals 
G. MANUAL 
This function enables to allow the condition type to be entered manually also apart from automatic pickup. 
H. MANDATORY 
This function identifies the conditions that are mandatory in the pricing procedure. The sales price is a mandatory condition type. 
I. STATISTICS 
This can be used to represent the cost price of the material sold, generally used for study statistical impacts of price 
J. PRINT 
The activation of this function will enable the printing of the values and conditions to the document. 
K. SUBTOTAL 
A key is assigned from the drop down menu; this can be used by the system in other area like Sis for reporting purpose also 
L. REQUIRMENT KEY 
This function is used to assign a requirement to the condition type. This requirement can be used to exclude the system from accessing the condition type and trying to determine the value. This can be used to specify that the condition type should only be accessed if the customer has a low risk credit. 
M. ALTERNATE CALCULATION TYPE 
This function allows you use a formula as an alternative in finding the value of the condition type, instead of standard condition technique. this can be used to calculate complex tax structures. 
N. ALTERNATE CONDITION BASE VALUE. 
The alternative condition base value is a formula assigned to a condition type in order to promote an alternative base value for the calculation of a value.  
O. ACCOUNTS KEY 
The account keys form part of account determination. These keys are used here to define the posting of the revenue generated to respective account heads& to subsequent assignment to GL accounts. 
PR00- ERL 
          K007/KA00- ERS. 
          KF00- ERF………….& so On. 
P. ACCRUAL KEY. 
The accrual keys form part of account determination. These keys are used here to define the posting of the revenue generated to respective account heads& to subsequent assignment to GL accounts and payment to respective parties.