Blueprint shop - order of cannons

Assuming the cannons are ordered from simple-complicated (and/or price), I think the 20 stacker and Precise cannon should be swapped. (the Simple Cannon would be the simplest/cheapest cannon, the 20 stacker would be the most advanced/most expensive). The order of the other cannons might be fine, but the 20 stacker I think should definitely be the most expensive cannon, thus at the far right.