An elderly man whom I am friendly with is having problems walking. His family have asked me to help me take him to Shul Erve Shabos Mincha-Leil Shabos and Shabos morning. His going to Shul depends on how he feels and I anticipate there may be times when he would only go on Shabos morning. They would like to pay me - how do we organize the payment seeing that the help I provide is on Shabos (except when he may also go for Errev Shabos Mincha).
Answer:
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Best wishes.
