Set the title as nil if the title is blank before validation.
Include blank value for the title select on the form page.
Refactor customer_spec.rb.
Paginate sales_orders in admin/sales_orders/index action.
Paginate customers in admin/customers/index action.
Move statistics plot funtions to StatisticsPlot.
Do not import dragable plugin.
Remove letters and symbols before convert to float.
Implement statistics/sales_regions.
Fetch statistics data.
Show the data on the page.
Plot charts on the page.