PHP equation within html table row, or in database itself - php

Question

I have a site with a CSV upload, which pushes everything in the CSV to a temp table and then splits into smaller tables.
Currently, I have a display page that displays all of that info in HTML tables. Some sections, however, need to have a formulaic representation. In other words, as seen in the screenshot below, meter volume is divided by tester volume and the sum of that is multiplied by the tester accuracy. That number is divided by 100 to give the corrected accuracy.
Here is the code I have but it's not loading my web page and I think the PHP might be wrong in establishing the variables:
<table style="width:100%; border:none;
border-collapse:collapse;">
<? php
$test1FormA = $row['test1MeterVol'] / $row['test1TesterVol'];
$test1FormB = $test1FormA * $row['test1Accuracy'];
$test1FinalForm = $test1FormB / 100;
?>
<tr>
<td style="border:none; text-align: left;">Meter Volume: </td>
<td><? echo $row['test1MeterVol'];?> </td>
</tr>
<tr>
<td style="border:none; text-align: left;">Tester Volume: </td>
<td><? echo $row['test1TesterVol'];?> </td>
</tr>
<tr>
<td style="border:none; text-align: left;">Tester Accuracy: </td>
<td><? echo $row['test1Accuracy'];?> </td>
</tr>
<tr>
<td style="border:none; text-align: left;">Corrected Accuracy: </td>
<td><? echo $test1FinalForm;?> </td>
</tr>
</table>
There is currently no corrected accuracy in the database, so I wanted to find either a way to do it per line, like above, or a way to do that upon every CSV upload. There are 8 tests, so it would have to do that formula for 8 different fields per 5 records in the CSV upon upload. I currently have the CSV uploading into the temp table with a large insert statement.
Is there a way to just do this in the table row with PHP?
UPDATE: Screenshot of new results
UPDATE: Code for averaging issue
<?php
$sum=0;
for($i=1; $i<=8; $i++){
$testFormA = $row["test".$i."MeterVol"] / $row["test".$i."TesterVol"];
$testFormB = $testFormA * $row["test".$i."Accuracy"];
$testFinalForm = $testFormB / 100;
$sum += $testFinalForm;
echo"$sum";
?>
<td><?php echo round($testFinalForm,3) ?>%</td>
<?php }
$average = $sum / 8;
echo"$average";
?>
<td><?php echo round($average,3)?> </td>

Answer 1

There are many ways to do what you need. But the most important part is that you will need a loop structure to build your table with a pretty code, without repeating everything over and over.
In your case, you can use the following code to build your whole last row for all 8 tests:
<?php for($i=1; $i<=8; $i++){
$testFormA = $row["test".$i."MeterVol"] / $row["test".$i."TesterVol"];
$testFormB = $testFormA * $row["test".$i."Accuracy"];
$testFinalForm = $testFormB / 100;
?>
<td><?php echo $testFinalForm ?></td>
<?php } ?>
Instead of accessing indexes like "test4MeterVol" you use $i to build the index string to access the right value in each loop iteration.
Doing the equations inside the loop will give you different values based on each test.
Based on this code and the way to build indexes to access your data you should be able to build the other rows, which are much simpler.