table.internal {

    border: 1px solid;
    border-radius: 5px;
    width: 70%;
    margin: 20px auto;
    text-align: center;
}

.internal thead {
    border-top-right-radius: 5px;
    border-top-left-radius: 5px;
    background-color: #e7e7e7;
    font-weight: bolder;
}

.internal tbody tr:nth-child(even){
    background-color: #e7e7e7;
}
.internal td:last-child{
    text-align: right;
}

.internal td{
    padding: 5px;
}

.middle table{
    width: 100%;
}