.col-xs-15,
.col-sm-15,
.col-md-15,
.col-lg-15 {
    position: relative;
    min-height: 1px;
    padding-left: 15px;
    padding-right: 15px;
}

.col-xs-18,
.col-sm-18,
.col-md-18,
.col-lg-18 {
    position: relative;
    min-height: 1px;
    padding-left: 15px;
    padding-right: 15px;
}

.col-xs-7_5,
.col-sm-7_5,
.col-md-7_5,
.col-lg-7_5 {
    position: relative;
    min-height: 1px;
    padding-left: 15px;
    padding-right: 15px;
}

.col-xs-7_5 {
    width: 40%;
    float: left;
}

.col-xs-15 {
    width: 20%;
    float: left;
}

.col-xs-18 {
    width: 12.5%;
    float: left;
}

@media (min-width: 768px) {
    .col-sm-7_5 {
        width: 40%;
        float: left;
    }
    .col-sm-15 {
        width: 20%;
        float: left;
    }
    .col-sm-18 {
        width: 12.5%;
        float: left;
    }
}
@media (min-width: 992px) {
    .col-md-7_5 {
        width: 40%;
        float: left;
    }
    .col-md-15 {
        width: 20%;
        float: left;
    }
    .col-md-18 {
        width: 12.5%;
        float: left;
    }
}
@media (min-width: 1200px) {
    .col-lg-7_5 {
        width: 40%;
        float: left;
    }
    .col-lg-15 {
        width: 20%;
        float: left;
    }
    .col-lg-18 {
        width: 12.5%;
        float: left;
    }
}

@media (min-width: 768px) {
    .dropdown:hover .dropdown-menu {
        display: block;
    }
}