‘And when the Sabbath day was past Mary Magdalene, and Mary the mother of James, and Salome, bought spices that they might come and anoint him.'
Mark telescopes the account. He is not concerned about the detail but the basic facts. He tells us first that these three had to buy more spices once the Sabbath was over. They had discovered that they did not have sufficient, but the arrival of the Sabbath had cut short their plans and nothing could be done on the Sabbath. The purchase of spices and their application to the body were forbidden on the Sabbath. So they waited until after sunset on that day and then went out and purchased what they needed.
We should perhaps note the love revealed by their actions. The body had now been dead for over a day, and by the time they reached it a day and a half, yet they were determined that He should be anointed, come what may.
He says nothing about Mary Magdalene, the youngest and most agile, leaving the others in their preparation, going on ahead to discover what was happening at the tomb, and her subsequent experiences and her meeting up with Jesus Himself (John 20:1-18). For what he was concerned about was the experience of the whole band of women who had shared the vigil at the cross. (Whether Mary rejoined them again at any stage we do not know).