Marigold, Inc. is a company that manufactures and sells a single product. Unit sales for each of the four quarters of $2025$ are projected as follows.

$\backslash$table$[[$Quarter$,$Units$],[$First$,72,000],[$Second$,135,000],[$Third$,495,000],[$Fourth$,108,000],[$Annual total,$810,000]]$

Marigold incurs variable manufacturing costs of $$0\mathrm{.}40$ per unit and variable nonmanufacturing costs of $$0\mathrm{.}40$ per unit. Marigold will incur fixed manufacturing costs of $$648,000$ and fixed nonmanufacturing costs of $$972,000.$ Marigold will sell its product for $$4$ per unit.

$($a$)$

Determine the amount of net income Marigold will report in each of the four quarters of $2025,$ assuming actual sales are as projected and employing the integral approach to interim financial reporting. $($Ignore income taxes.$)$ Repeat the analysis under the discrete approach. $($Round answers to $0$ decimal places, e$.$g$.5,125.$ Enter negative amounts using either a negative sign preceding the number e$.$g$.-45$ or parentheses eg$.(45).)$

$($b$1).$

Compute Marigold's profit margin on sales for each of the four quarters of $2025$ under both the integral and discrete approache: $($Round answers to $1$ decimal place, e$.$g$.52\mathrm{.}5\%.$ Enter negative amounts using either a negative sign preceding the number eg$.-45$ or parenthesese.g$.(45).)$