4.15 The contention of the applicant that the provisions of Rule 27(b) will be applicable for the instant case for the purpose of determination of value of supply has duly been considered. Rule 27 of the Central Goods and Services Tax Rules, 2017 and West Bengal Goods and Services Tax Rules, 2017 (collectively referred to as, the GST Rules) prescribes the manner of determination of value of supply where the consideration is not wholly in money. In terms of clause (b) of the said rule, the value of supply shall be the sum total of consideration in money and any such further amount in money as is equivalent to the consideration not in money, if such amount is known at the time of supply. We like to reiterate that Department of Food & Supplies, Government of West Bengal vide memo no. 569(3)-FS/Sectt./Food/4P-02/2016/2021 dated 18th February 2022 has explained that „These bi-products are valued as per market price @ Rs.20/kg of Bran and Re 1/kg of Refractor. So, consideration from sale of 4kg Bran and 1kg refractor comes to Rs.81 only. 100 Kg wheat is supplied to flour millers in 2 gunny bags. The flour millers retained those 2 gunny bags, which are valued at Rs.43 only. Thus the total non-cash consideration for bi-products and gunny bags allowed to flower millers is Rs.124 only for each 100 kg wheat‟. So, in the instant case, the amount of Rs.124 may be considered as equivalent to the consideration not in money for the purpose of determination of value of supply under clause (b) of rule 27 of the GST Rules and such amount is admittedly known to the applicant at the time of supply. We therefore find the total value of supply to be Rs.260.48 out of which Rs.136.48 is the cash consideration and Rs.124 is the non-cash consideration, as it has been explained in the aforesaid memo. The applicant has contended that the value of materials will be definitely less than the value of packing charges as mentioned in the consideration (refer to Para 2.26). However, in absence of any documentary evidences produced before us in support of this argument, we find that the value of goods involved in the instant supply stands at Rs.60/- against total value of supply of Rs. 260.48 thereby the value of goods involved in the instant composite supply stands at 23.03% of the total value of supply i.e., it does not exceed 25% of the value of the composite supply. We, therefore, hold that the instant supply of services by way of milling of food grains into flour (atta) to Food & Supplies Department, Govt. of West Bengal for distribution of such flour under Public Distribution System is eligible for exemption under serial no. 3A of the Notification No. 12/2017-Central Tax (Rate) dated