4.
RCM on freight is applicable to GTA services and not to everyone.
Moreover what amount should constitute value of supply depends on valuation rules read with Sec 15 if valuation is required. It comes into play only with respect to whether freight charges ought to be a part of the value of supply billed to the recipient.
A further question that needs to be analysed is the nature of supply between cement company and C and F agent when it comes to reimbursements. Whether this in itself is another supply attracting GST also will have to be verified.
All these things depends on the contractual relationship between the parties.
As to whether C and F agent is a pure agent as per Rule 33 is a fact to be ascertained from each individual case on the basis of the contract with the cement company. Names like advertising agency, travel agency etc are obvious misnormers and they have nothing to do with Agency relationship as such. This is evident from the conditions to be treated as a pure agent as per rule 33
For the purposes of this rule, the expression "pure agent" means a person who-
(a) enters into a contractual agreement with the recipient of supply to act as his pure agent to incur expenditure or costs in the course of supply of goods or services or both;
(b) neither intends to hold nor holds any title to the goods or services or both so procured or supplied as pure agent of the recipient of supply;
(c) does not use for his own interest such goods or services so procured; and
(d) receives only the actual amount incurred to procure such goods or services in addition to the amount received for supply he provides on his own account.