Due to the delay of the meeting on accounting work at the office, I made an excuse to my son...

Mother: I'm sorry. The accounting work took so long.
Son: What's accounting?
Mother: It's about, for example, counting how much money we have.
Son: How-much! I love How-much!! ("how much" sounds "salmon caviar" in Japanese)
Mother: ....

I'll do my best, so that I can buy salmon caviar.