1. Planned retail value:
Planned Retail Value = 23000 / (1 - 0.595)
Planned Retail Value ≈ 56790.12
2. Remaining retail value needed:
Remaining Retail Value = 56790.12 - 9800
Remaining Retail Value ≈ 46990.12
3. Remaining retail value at cost:
Remaining Retail Value at Cost = (4500 / 9800) * 46990.12
Remaining Retail Value at Cost ≈ 21621.29
4. Markup percentage needed on the remaining purchases:
Markup Percentage = (46990.12 / 21621.29) - 1
Markup Percentage ≈ 1.173
So, the markup percentage that must now be obtained on the balance of the purchases for May to achieve the planned markup percentage for the month is approximately 117.3%.