<p>@withtheflow, two test versions?</p>
<p>@megan702, Well, a barrel weighs 9 times more than a crate, and there are 6 times more crates than barrels. If the barrels are 1200kg, how much does the total weigh? </p>
<p>Say crate = 1kg, barrel = 9kg.
So, 1200/9 = 133.33333. That is total amount of barrels… So 6* more crates = 133.333*6 = 800. (Total weight of all crates in truck)</p>
<p>1200+800=2000kg total truck is holding…</p>