A restaurant bakes its own bread at a cost of $$1\mathrm{.}70$ per loaf including fixed costs of $42$ cents per loaf. A proposal is to purchase bread from an outside source for $$1\mathrm{.}15$ per loaf plus a delivery fee of $15$ cents per loaf. Prepare a differential analysis in the proper format to determine whether should continue to make $($alternative $1)$ or buy $($alternative $2)$ the bread, assuming that fixed costs will not be affected by the decision.

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