roi-calculator

# ROI Calculator This skill helps you calculate and communicate the return on investment for influencer marketing campaigns using various methodologies appropriate for your goals and available data. ## Quick Start Shortest invocation: ``` Calculate ROI for our influencer campaign: $25K spend, $72K revenue, 2.1M reach ``` Common scenario — compare methods before reporting: ``` What's the ROI of our campaign using direct revenue, EMV, and LTV-based methods? ``` ## Skill Contract - **Reads**: campaign spend breakdown, results data (reach, impressions, engagements, clicks, conversions, revenue, new customers), AOV and repeat-rate data if LTV is in scope, any prior performance output from `performance-analyzer`. - **Writes**: ROI calculation file at `memory/influencer/roi-calculator/YYYY-MM-DD-<topic>.md` containing direct ROI/ROAS, EMV, cost-efficiency metrics, attribution-modeled revenue, LTV-based ROI, by-influencer ROI, and a summary report block. - **Promotes**: durable headline numbers (final ROI %, ROAS, total investment, net profit, recommended attribution model) to `memory/hot-cache.md`. - **Done when**: 1. At least one ROI methodology is computed with the inputs and formula shown. 2. Each headline metric is stated against a benchmark with a pass/fail status. 3. A bottom-line assessment (profitable / break-even / loss) and 1-3 recommendations are written. - **Primary next skill**: [report-generator](../../track/report-generator/SKILL.md) ### Handoff Summary...