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Compute required output to recover 10% investment

Last updated: Mar 29, 2026

Quick Overview

This question evaluates a candidate's ability to perform cost-volume-profit analysis and quantitative financial modeling, assessing skills in algebraic formulation of profit equations, capacity constraint evaluation, and derivation of generalized feasibility formulas.

  • medium
  • Capital One
  • Statistics & Math
  • Data Scientist

Compute required output to recover 10% investment

Company: Capital One

Role: Data Scientist

Category: Statistics & Math

Difficulty: medium

Interview Round: Technical Screen

Energy One operates a fossil-fuel plant with these economics: maximum output 8.8 million MWh/year; electricity sale price = $40/MWh; variable cost = $20/MWh; lease cost = $5 million/month; other fixed costs = $25 million/year; initial investment = $400 million. 1) How many MWh of production (X) are required for annual profit to cover 10% of the initial investment (i.e., $40 million), assuming the plant can sell all generated electricity at the stated price? Show the profit equation and solve for X. 2) Verify whether the required X is feasible given the annual maximum output constraint; if not, explain the shortfall and the breakeven that is achievable. 3) Generalize a formula for the required output to cover a target return R (in $) given price p, variable cost v, monthly lease L, annual fixed cost F, and capacity limit K. State any feasibility conditions clearly.

Quick Answer: This question evaluates a candidate's ability to perform cost-volume-profit analysis and quantitative financial modeling, assessing skills in algebraic formulation of profit equations, capacity constraint evaluation, and derivation of generalized feasibility formulas.

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Capital One
Oct 13, 2025, 9:49 PM
Data Scientist
Technical Screen
Statistics & Math
2
0

Power Plant Profit Target and Capacity Feasibility

Context

You are evaluating a fossil-fuel power plant. The plant can sell all electricity it generates at the stated price. Annual economics:

  • Maximum output: 8.8 million MWh/year
  • Price: $40/MWh
  • Variable cost: $20/MWh
  • Lease: $5 million/month
  • Other fixed cost: $25 million/year
  • Initial investment (sunk for this analysis): $400 million

Tasks

  1. Required output X (in MWh) for annual profit to equal 10% of the initial investment (i.e., $40 million). Write the annual profit equation and solve for X.
  2. Check whether the required X is feasible given the 8.8 million MWh/year capacity. If infeasible, quantify the shortfall and state the maximum breakeven/profit achievable under the capacity constraint.
  3. Generalize a formula for required output to cover a target annual return R (in $) given:
    • price p ( /MWh),variablecostv(/MWh), variable cost v (/MWh),variablecostv( /MWh), monthly lease L ( /month),annualfixedcostF(/month), annual fixed cost F (/month),annualfixedcostF( /year), and capacity limit K (MWh/year). State feasibility conditions clearly.

Solution

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