Cindy Inc. purchased a machine for $25,000; the seller is holding the note. Cindy Inc. paid $3,500 for improvements to extend the life of the machine. Cindy Inc. has deducted depreciation on the machine for 3 years totaling $15,000. Cindy Inc. owes $10,000 to the seller. What is Cindy Inc.s adjusted basis in the machine?

$28,500

$18,500

$10,000

$13,500