Compute Vaughn's profit margin on sales for each of the four quarters of $2025$ under both integral and discrete approaches. First Quarter Integral approach $$126,000\mathrm{.}00,$ Second Quarter Integal approach $$236,250,00,$ Third Quarter Intergal approach $$866,250\mathrm{.}00,$ Fourth Quarter Integral approach $$189,000\mathrm{.}00$ and First Quarter Discrete approach $$-93,240\mathrm{.}00,$ Second Quarter Discrete approach $$122,850\mathrm{.}00,$ Third Quarter Discrete Approach $$1,357,650\mathrm{.}00,$ Fourth Quarter Discrete approach $$30,240\mathrm{.}00$