what is the variable type?

$1="$$$0-$ $$4,999"$

$2="$$$5,000-$ $$9,999"$

$3="$$$10,000-$ $$14,999"$

$4="$$$15,000-$ $$19,999"$

$5="$$$20,000-$ $$24,999"$

$6="$$$25,000-$ $$34,999"$

$7="$$$35,000-$ $$44,999"$

$8="$$$45,000-$ $$54,999"$

$9="$$$55,000-$ $$64,999"$

$10="$$$65,000$ $$74,999"$

$14="$$$75,000-$ $$99,999"$

$15="$$$100,000$ and over"