Give the step-by-step reasoning process and then the final answer. Mabel planted 4 tomato plants. One tomato plant bore 8 tomatoes and another bore 4 more tomatoes than the first. The two remaining plants each bore three times the number of tomatoes as the first two plants combined. How many tomatoes does Mabel have?
The second tomato plant bore 8 + 4 = 12 fruit. The first two plants bore 8 + 12 = 20 fruit combined. Each of the other two plants bore 20 x 3 = 60 fruit. Mabel has 8 + 12 + 60 + 60 = 140 tomatoes.
The final answer: 140.