Why do accumulatives accumulate in a cycle that must be presented separately in PHP?

I have a table that generates records with different values, for each record there will be a value called atenuante which represents a selection made with checkbox .

These values are saved as a string de la forma 1-2 and in another table I have a value that corresponds to each option, being something like:

Atenuante: 1 | Valor: 0.2
Atenuante: 2 | Valor: 0.15
Atenuante: 3 | Valor: 0.25

In the system I make a explode to separate the string atenuante like this: 1 y 2 and then look up its value in another table. In order to obtain a summation to then show its value:

1= 0.2 | 2= 0.15 | total = 0.35

  

I happen to be calculating the sum well, but take that total and then add it to the total of the next record, something like this:

Registro 1 | total= 0.35
Registro 2 | total= (total real= 0.25) muestra: 0.60
Registro 3 | total= (total real= 0.36) muestra: 0.96
Registro 4 | total= (total real= 0.10) muestra: 1.06

I would like each value to be calculated separately and thus be shown, without accumulating:

Registro 1 | total= 0.35
Registro 2 | total= 0.25
Registro 3 | total= 0.36
Registro 4 | total= 0.10

This is the PHP code:

<?php
$query = "SELECT c_atenuante FROM sancionados";
$resultado = mysql_query($query) OR DIE("La consulta $query fallo" . mysql_error());

while ($registros = mysql_fetch_array($resultado)) //SI EXISTEN REGISTROS

    {
    $atenuantes = $registros["c_atenuante"];
    echo "<td>" . $atenuantes . "</td>";
    $atenuantes_explode = explode("-", $atenuantes);
    $cantidad_atenuantes = count($atenuantes_explode);
    for ($i = 0; $i < $cantidad_atenuantes; $i++)
        {
        $atenuante_seleccionado = $atenuantes_explode[$i] * 1;
        $query3 = "SELECT * from causas_nuevas2 where c_articulo=40 and c_aparte='$atenuante_seleccionado'";
        $resultado3 = mysql_query($query3) OR DIE("La consulta $query3 fallo" . mysql_error());
        if ($registros3 = mysql_fetch_array($resultado3))
            {
            $valor_atenuante = $registros3["valor"];
            $total_circunstancias1 = $total_circunstancias1 + $valor_atenuante;
            }
        }

    echo "<td>" . $total_circunstancias1 . "</td>";
    echo "</tr>";
    }

?>

NOTE:

• Check the count and each record shows the amount: 1 , 2, 2, 1, 2, 1. .

• Verify the value obtained, and do it well: 1=0.2, 2=0.3: 3=0.15 .

• I multiply by 1, since the table where the values are is an integer, and the explode generates string.