Spelling difficulty

A young lass left school, and soon got a job as a typist at a nearby brewery.
But she was back home at lunch time, sacked!!
"What on earth happened?" her father asked.
"It was my own fault, I suppose." she replied. "I couldn't spell the word 'firkin.'"
"I'm not surprised," said dad.
But she was back home at lunch time, sacked!!
"What on earth happened?" her father asked.
"It was my own fault, I suppose." she replied. "I couldn't spell the word 'firkin.'"
"I'm not surprised," said dad.
Spoiler: