My numbers are from 2014, so FWIW:
"Even the young NHL contract players on a 2-way contract playing in the AHL do not make large sums of money since the maximum for an Entry Level Contract AHL salary is capped at $70,000 under the current CBA (Collective Bargaining Agreement). (See below for more information including additional bonuses.) The exceptions are for the older players who have spent more years in the system, or in the odd cases of a one-way contract player who has been sent down to the minor leagues. The NHL one-way contract player is paid the same salary regardless whether he is playing in the NHL or the AHL."
https://artfulpuck.wordpress.com/2012/08/23/the-life-of-a-minor-league-hockey-player-dollars-sense/
Assume the above numbers still true, and assume that the ELC amount is $925,000 for Kerby at NHL level (per hockeyscap.com). The pay per AHL game (assuming same 82 game season) is $853 per game. Almost all ELC's are 2-way contracts, meaning player can be moved freely between NHL and AHL without clearing waivers. If $925,000 is the ELC contract figure for NHL time, then the pay per NHL game is $11,280 per game. A two-game cup of coffee would be an extra $20,000 plus extra per diems. While that may not be the millions that the vets get paid, that difference doesn't sound like peanuts to someone on an ELC that made $853 a game last week! Ooops - that was oversimplification, because they actually get paid based on number of days up on roster (186 days typically compose a season), not on the games played. So the math probably isn't too far off, but not precise. On a per day difference, using 186 days as the season length, every day is $376 per day while AHL, and $4,973 per day NHL. Kerby has been up since ??? Monday??? so 5 days x $4597 = $22,985 difference....buys a truck (or at least half of one) and lets you buy dinner for AHL teammates.