Give the step-by-step reasoning process and then the final answer. Dale and Andrew had breakfast at a cafe. A slice of toast costs £1, and eggs cost £3 each. Dale had 2 slices of toast and 2 eggs. Andrew had 1 slice of toast and 2 eggs. How much did their breakfast cost?
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The cost of Dale's toast is 2 × $1 = $2. The cost of Andrew's toast is 1 × $1 = $1. The cost of Dale's eggs is 2 × $3 = $6. The cost of Andrew's eggs is 2 × $3 = $6. Their breakfast cost $2 + $1 + $6 + $6 = $15.
The final answer: 15.
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