public double cost() {
        return (vcpu * cpuUnitCost) +
               (memoryGiB * memoryUnitCost) +
               (diskGb * diskUnitCost) +
               (gpuResources.count * gpuResources.memoryGiB * gpuUnitCost);
    }
Returns the standard cost of these resources, in dollars per hour
config-provisioning/src/main/java/com/yahoo/config/provision/NodeResources.java