app/assets/stylesheets/invoices_controller.css

Summary

Maintainability
Test Coverage
.num-span {
    display: inline-block;
    width: 100px;
    text-align: right;
}
.num-span-table td {
   text-align: left;
   white-space: nowrap;
   padding: 2px !important;
 }
.num-span-table th {
  text-align: center;
  white-space: normal;
  width: 10px;
}