Sunday night = Jack Benny, so here's "Jack buys Don's Christmas present" (12-8-46). Mel Blanc is the slowly-driven-insane sales clerk; the great Frank Nelson is the surly floorwalker. This is a good one (but I'll say that every time).
(I looked up the coal strike of 1946 but still can't figure out what the "fine" reference means.)
Bonus! Jack Webb as Pat Novak for Hire: "Mixup at the Laundry" (5-7-49).