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Replacing an old double wall oven

We want to replace our existing Westinghouse double wall oven below with a Bosch Double Oven model reference: MBG5787S0A. The current dimensions of the cabinet that house the oven is 105cm (H) x 67cm (W). Our existing oven dimensions are 96cm (H) x 60cm (W). The new oven dimensions are 88.8cm (H) x 59.4cm (W). I have attach the a couple of picture of the existing oven. I want to know what is the process so the cabinet aesthetic is perfect for the new oven and the cost estimate. Thank you.