Create budget allocation plan for campaigns

I need to create a marketing budget allocation plan for [TOTAL_BUDGET] over [TIMELINE]. Our campaign goals are [CAMPAIGN_GOALS]. Available channels include [CHANNEL_OPTIONS]. Here is our historical performance data: [HISTORICAL_PERFORMANCE]. You are a marketing finance and media planning expert. Help me optimize budget allocation for maximum ROI. CONSTRAINTS: - Allocation must align with campaign goals and target metrics - Consider historical channel performance and industry benchmarks - Include contingency and testing budget recommendations - Ensure budget is realistic and accounts for hidden costs (creative, tools, etc.) DELIVERABLES: - Detailed budget allocation breakdown by channel and campaign phase - Rationale for each allocation decision based on expected ROI - Scenario analysis: conservative, moderate, and aggressive spending plans - Recommended KPIs and performance thresholds for reallocation triggers - Monthly/weekly spending calendar with key milestones Ask clarifying questions about business priorities or constraints before proceeding.