Complex sentence: Sales of the download single were good, with midweek charts for 26 May showing that the single had achieved a place inside the UK top 20, however when the week's charts were revealed on Sunday 30 May the single had entered the charts at number 29.
Split into simpler sentences: Sales of the download single were good, with midweek charts for 26 May showing that the single had achieved a place in the UK top 20. However, when the week's charts were revealed on Sunday 30 May, the single had entered the charts at number 29.