rails5-depot/app/assets/stylesheets/carts.scss

// Place all the styles related to the Carts controller here.
// They will automatically be included in application.css.
// You can use Sass (SCSS) here: http://sass-lang.com/
.carts {
  .item_price, .total_line {
    text-align: right;
  }

  .total_line .total_cll {
    font-weight: bold;
    border-top: 1px solid #595
  }
}