What do Eula and Starla do to help pay back their debt to Cyrena in the novel, Whistling Past the Graveyard?

Eula and Starla prepare baked goods in Cyrena’s kitchen. They are sold to local diners, eatiers, and other places of business as well as residents. The money earned from the sales will be used to pay back Cyrena and to pay for truck repairs so that Starla and Eula may continue on their way to Nashville.