The instructions are hosed. Here's how I'd do for a hypo gift of $30k by one spouse to a kid. Result = entire annual exclusion used and the same is repeated for the other spouse....mailing both returns in the same envelope.
Gift of $30k:
FMV of gift by H = $30k x 1/2 = $15k
FMV of gift by W = $30k x 1/2 = $15k
Part 4 Line 1 = $15k
Part 4 Line 2 = $15k
Part Line 3 = $0
