', right: '\
A_{wall} = \text{Wall Perimeter} \times \text{Room Height}
A_{gross} = A_{wall} + A_{ceiling}
A_{net} = \max(0, A_{gross} - A_{openings})
A_{total} = A_{net} \times (1 + \frac{\text{Wastage \%}}{100})
N_{sheets} = \lceil \frac{A_{total}}{A_{sheet}} \rceil