Here's some math on batteries. Because it's 2020, and who would have thought that we'd still be buying these all the time?
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Brand: Vivitar Size: AA
$7.20 / 4 batteries = $1.80/battery
ASIN: B005JTDIR4
Brand: Vivitar Size: AAA
$8.10 / 4 batteries = $2.02/battery
ASIN: B004SHXAYO