Description of problem:
-----------------------
I'm unable to generate Chargeback reports for SCVMM when the following fields are added to the report.I can successfully generate Chargeback reports when other fields are added to the report.


Storage Allocated , Storage Allocated Cost

Here's a snippet from evm.log:

[----] E, [2017-01-19T14:57:46.543893 #2945:73f140] ERROR -- : [FloatDomainError]: Infinity Method:[rescue in _async_generate_table]
[----] E, [2017-01-19T14:57:46.544229 #2945:73f140] ERROR -- : /var/www/miq/vmdb/app/models/chargeback_rate_detail.rb:62:in to_r' /var/www/miq/vmdb/app/models/chargeback_rate_detail.rb:62:in<='
/var/www/miq/vmdb/app/models/chargeback_rate_detail.rb:62:in block in find_rate' /opt/rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/activerecord-5.0.1/lib/active_record/associations/collection_association.rb:92:inblock in select'
/opt/rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/activerecord-5.0.1/lib/active_record/associations/collection_association.rb:92:in select' /opt/rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/activerecord-5.0.1/lib/active_record/associations/collection_association.rb:92:ineach'
/opt/rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/activerecord-5.0.1/lib/active_record/associations/collection_association.rb:92:in select' /opt/rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/activerecord-5.0.1/lib/active_record/associations/collection_proxy.rb:110:inselect'
/var/www/miq/vmdb/app/models/chargeback_rate_detail.rb:60:in find_rate' /var/www/miq/vmdb/app/models/chargeback_rate_detail.rb:84:inhourly_cost'
/var/www/miq/vmdb/app/models/chargeback_rate_detail.rb:236:in metric_and_cost_by' /var/www/miq/vmdb/app/models/chargeback_rate_detail.rb:26:incharge'
/var/www/miq/vmdb/app/models/chargeback.rb:71:in block (2 levels) in calculate_costs' /var/www/miq/vmdb/app/models/chargeback.rb:70:ineach'
/var/www/miq/vmdb/app/models/chargeback.rb:70:in block in calculate_costs' /var/www/miq/vmdb/app/models/chargeback.rb:69:ineach'
/var/www/miq/vmdb/app/models/chargeback.rb:69:in calculate_costs' /var/www/miq/vmdb/app/models/chargeback.rb:29:inblock in build_results_for_report_chargeback'
/var/www/miq/vmdb/app/models/chargeback/consumption_history.rb:15:in block (2 levels) in for_report' /opt/rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/activerecord-5.0.1/lib/active_record/relation/delegation.rb:38:ineach'
/opt/rubies/ruby-2.3.1/lib/ruby/gems/2.3.0/gems/activerecord-5.0.1/lib/active_record/relation/delegation.rb:38:in each' /var/www/miq/vmdb/app/models/chargeback/consumption_history.rb:14:inblock in for_report'
/var/www/miq/vmdb/app/models/chargeback/consumption_history.rb:13:in each' /var/www/miq/vmdb/app/models/chargeback/consumption_history.rb:13:ineach_cons'
/var/www/miq/vmdb/app/models/chargeback/consumption_history.rb:13:in for_report' /var/www/miq/vmdb/app/models/chargeback.rb:19:inbuild_results_for_report_chargeback'
/var/www/miq/vmdb/app/models/chargeback_vm.rb:45:in build_results_for_report_ChargebackVm' /var/www/miq/vmdb/app/models/miq_report/generator.rb:193:in_generate_table'
/var/www/miq/vmdb/app/models/miq_report/generator.rb:167:in block in generate_table' /var/www/miq/vmdb/app/models/user.rb:241:inwith_user'
/var/www/miq/vmdb/app/models/miq_report/generator.rb:167:in generate_table' /var/www/miq/vmdb/app/models/miq_report/generator/async.rb:96:in_async_generate_table'
/var/www/miq/vmdb/app/models/miq_queue.rb:347:in block in deliver' /opt/rubies/ruby-


Version-Release number of selected component (if applicable):
--------------------------------------------------------------
5.7.1


How reproducible:
-----------------
Always


Steps to Reproduce:
-------------------
1.Manage a provider.Enable C&U for the provider.
2.Assign Compute rates and generate a Chargeback report.


Actual results:
---------------
Error generating Chargeback reports.


Expected results:
-----------------
No errors while generating Chargeback reports.


Additional info:
-----------------
https://github.com/ManageIQ/manageiq/issues/13591