what does Total mean in jmeter listener Summary Report table for transaction controller
<p>I have test plan with 1 transaction controller, inside controller i have 2 http sampler. 
When generate Summary Report table, i have output</p>

<p><a href="https://i.stack.imgur.com/CR0Cs.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CR0Cs.png" alt="enter image description here"></a></p>

<p>what does Total mean in jmeter listener Summary Report table for transaction controller?
why i have 1500 in the total, in transaction controller i have 500 ( combine from 2 sampler).
and my understanding is total should be 1000 (from 2 sampler) or 500 (from 1 transaction controller)</p>