I think your call had to ring up for more than $10.99.
To hypothetically put myself in the same boat, if I went to my local Scheels to buy this call, I'd be paying the 6.4% total state/local sales tax, plus the new 6.5% tax, plus a 2.5% "public improvement fee" that is basically an additional BS tax charged by the developer of the shopping center that is supposed to go towards landscaping, maintenance, etc.
On the $10.99 call this would still only bring my total to $12.68. You'd be at 28% or more to bring the total over $14 on a $10.99 purchase which seems high even for Colorado with all its special metro districts, public improvement fees, etc.
I also don't see anything in the legislation that would apply the new tax to an elk call. It applies to firearms, "firearm precursor parts", and ammunition.