:facepalm:Generally, no. Is it necessarily a sin to purchase food on Sunday? What about gasoline? Paying a road, bridge, or tunnel toll? Purchasing a train, plane, bus ticket? Paying taxi fare? If any of these is sinful, then most of us are doomed to hell. So is the priest who paid to bring us Mass and Sacraments. Only if someone said to me, "I purchased this food on Sunday for the purpose of offending God, and I now invite you to partake of it," might it be sinful. But who does this?