Excel Models from Plain English

Build me an Excel revenue forecast model (.xlsx) for a SaaS business with these specs:

INPUTS TAB:
- Starting MRR: $${mrr}
- Monthly new customer adds: ${newCustomers} (growing ${growthRate}% month-over-month)
- Average contract value: $${acv}/month
- Monthly churn rate: ${churnRate}%
- Expansion revenue: ${expansionRate}% of existing base per month
- Forecast period: 24 months

CALCULATIONS TAB:
- Use real formulas, not hardcoded values
- New MRR = new customers × ACV
- Churned MRR = beginning MRR × churn rate
- Expansion MRR = beginning MRR × expansion rate
- Ending MRR = Beginning MRR + New MRR - Churned MRR + Expansion MRR
- ARR = MRR × 12
- Net Revenue Retention = (Ending MRR - New MRR) / Beginning MRR

SUMMARY TAB:
- Monthly and quarterly rollups
- Key metrics: ARR, net new MRR, NRR, customer count
- Conditional formatting: green for growth, red for contraction

Format all currency cells as accounting format. Include cell comments explaining each formula.

Build an LBO model in Excel (.xlsx) with these parameters:

TRANSACTION TAB:
- Enterprise Value: $${ev}M
- Purchase multiple: ${multiple}x EBITDA
- LTM EBITDA: $${ebitda}M
- Senior debt: ${seniorDebt}x EBITDA at ${seniorRate}% interest
- Sub debt: ${subDebt}x EBITDA at ${subRate}% interest
- Equity check = EV - total debt
- Transaction fees: 2% of EV

OPERATING MODEL TAB (5-year projection):
- Revenue growth: ${revenueGrowth}% Year 1, declining 1% per year
- EBITDA margin: ${margin}% (flat)
- Capex: 3% of revenue
- Working capital: 5% of incremental revenue
- Tax rate: 25%
- Use =EBITDA-Capex-Taxes-WC change for free cash flow

DEBT SCHEDULE TAB:
- Mandatory amortization: 5% of original senior debt per year
- Cash sweep: 50% of excess cash flow to senior debt
- Use MIN() formulas for debt paydown (can't pay more than outstanding)

RETURNS TAB:
- Exit at same multiple as entry
- Calculate equity value at exit for each year (Year 3-5)
- Use =IRR() for equity returns
- Use =XIRR() with actual dates
- MOIC = exit equity / entry equity

Include proper formula chains — every cell should trace back to inputs. No circular references.

Create a detailed operating model in Excel (.xlsx):

HEADCOUNT TAB:
- Departments: Engineering, Sales, Marketing, CS, G&A
- For each: current headcount, planned hires by quarter, average fully-loaded cost per head
- Use =SUMPRODUCT(headcount, cost_per_head) for total department cost
- Include hiring ramp (new hires at 50% productivity for first quarter)

REVENUE TAB:
- Self-serve: ${selfServe} customers × $${selfServeACV}/mo, growing ${selfServeGrowth}%/mo
- Sales-led: ${salesLed} customers × $${salesLedACV}/mo, new deals = reps × quota attainment
- Quota per rep: $${quota}/quarter, attainment: ${attainment}%
- Churn: ${churn}% monthly for self-serve, ${enterpriseChurn}% for sales-led

EXPENSE TAB:
- Hosting/infra: ${hostingPct}% of revenue (use formula, not value)
- Marketing spend: $${marketingSpend}/month, growing 5% quarterly
- All department costs pulled from headcount tab via cell references
- Benefits load: 25% on top of base salary

P&L SUMMARY TAB:
- Revenue, COGS, Gross Profit, Gross Margin %
- OpEx by department
- EBITDA, EBITDA margin
- Quarterly and annual columns
- Use =IFERROR() wrappers on all division formulas

Format: accounting format for dollars, percentage format for margins, conditional formatting for negative values.

I have an Excel model with a circular reference I can't find. Here's the structure:

Tab: Revenue
- B5: =B4*(1+Assumptions!C3) -- MRR growth
- B6: =B5*12 -- ARR

Tab: Expenses
- C10: =Revenue!B5*0.15 -- hosting costs
- C15: =SUM(C10:C14) -- total COGS
- C20: =Revenue!B5-C15 -- gross profit

Tab: Assumptions
- C3: =IF(Expenses!C20>0, 0.05, 0.02) -- growth rate depends on profitability

The circular reference is: Revenue depends on Assumptions, which depends on Expenses, which depends on Revenue.

How do I restructure this to eliminate the circular reference while keeping the logic that growth rate should depend on profitability?

Write a SUMPRODUCT formula for this scenario:

I have a data table in Sheet1 with columns:
- A: Sales Rep Name
- B: Region (East, West, Central)
- C: Deal Stage (Won, Lost, Pipeline)
- D: Deal Value
- E: Close Date

I need formulas for:
1. Total won deals for the East region
2. Total pipeline value for rep "${repName}" in Q1 2026
3. Count of won deals over $${threshold} in the West region
4. Average deal size for won deals by region (one formula I can drag across)

Use SUMPRODUCT, not SUMIFS. Show me the formulas with explanations of each component.

Build an investment analysis workbook (.xlsx) for a real estate or project investment:

CASH FLOWS TAB:
- Initial investment: -$${investment} on ${startDate}
- Monthly cash flows for ${months} months (list provided, or generate realistic ones)
- Exit/sale proceeds: $${exitValue} at end of period
- All dates in column A, cash flows in column B

RETURNS TAB:
- =IRR() on the cash flow series
- =XIRR() using actual dates (more accurate for irregular timing)
- =NPV() at discount rate of ${discountRate}%
- =XNPV() using actual dates at same discount rate
- Include a note explaining when to use IRR vs XIRR

SENSITIVITY TAB:
- Data table varying exit value (+/- 20% in 5% increments) against discount rate (8%, 10%, 12%, 15%)
- Use Excel's Data Table feature (What-If Analysis)
- Conditional formatting: green for positive NPV, red for negative

Show the formula for each cell, not just the result.