Trend Analysis on Sales Data

I require an Excel file with a trend analysis of sales data, along with a PowerPoint presentation summarizing the key findings. The Excel file should include charts and graphs for data visualization.

Ideal Skills:
- Proficient in Excel, particularly in trend analysis.
- Able to create comprehensive and clear PowerPoint presentations.
- Experienced in data visualization using charts and graphs.

Requirements:
- Analyze sales data to identify trends.
- Use Excel to create various charts and graphs.
- Summarize findings in an easy-to-understand PowerPoint presentation.