The term differential cost is identified in base64 scheme by the sequence ZGlmZmVyZW50aWFsIGNvc3Q=, while the MD5 signature is equal to 9fca60afc4e8c1c3b3b3fc7e790dfe69. The ASCII encoding of differential cost in hexadecimal notation is 646966666572656e7469616c20636f7374.