How does the theft of Mum's rings create a financial crisis for the Fuller family as noted in the memoir, Don’t Let’s Go to the Dogs Tonight: An African Childhood?

When a farm worker steals Mum's rings, it is a major financial crisis for the Fuller family. Each year, Dad pawns the rings for money to plant a tobacco crop. After harvest, when the tobacco is sold, he pays off the loan, pays a bit on the mortgage on the farm, and redeems the rings. Without the rings, the Fullers will lose the farm. Fortunately, Dad and a crew of men track down the culprit and recover the rings.