Answer:
$38,000
Step-by-step explanation:
Since the Jones elected gift splitting, each spouse will may give $15,000 worth of gifts to their son without paying taxes:
the total value of the gifts (must use fair market value) = $15,000 (minivan) + $18,000 (bonds) + $35,000 (furniture) = $68,000
taxable amount = $68,000 - $30,000 (combined tax free gifts) = $38,000