Answer:
The car getting broken turned out to be a blessing in disguise. The reparations could cost an arm and a leg, but I hit the nail on the head when I asked my brother to help me fix it before he left town. He agreed to help at the drop of a hat, and with him, the reparations were not only a piece of cake but also half the budgeted cost.
Step-by-step explanation:
An idiom is a phrase or a group of words with a meaning that is not inferable from the chosen words but by custom and usage.