paraphrase and summarize using synonyms: For instance, if Wal$-$Mart evaluates payment gateways and finds one that offers a lower transaction fee of $2\mathrm{.}2\%+20$ cents per transaction compared to another gateway's $2\mathrm{.}9\%+30$ cents, choosing the more cost$-$effective option could result in significant savings. Additionally, if the chosen gateway provides seamless integration with Wal$-$Mart's existing e$-$commerce system, it could reduce maintenance costs and the need for extensive technical support, further lowering overhead.