The correct header for the CSV file is as follows:
serverModelName,manufacturer,numCpus,cpuType,cpuGhz,memGb,numberOfServers,dateOfPurchase,pricePerServer,batchType,dataCenterName
dataCenterName is optional. If there is a comma in any field, for example: "Server Manufacturer, Model1", the field in the CSV should be as follows:
"ServerManufacturer,Model1"
Any white space inbetween fields, or between words themselves, will cause the CSV to fail importing into vRealize Business.