An income statement for Sam's Bookstore for the first quarter of the year is presented below:

$\backslash$table$[[\backslash$table$[[$S$$mm$\text{'}$s Bookstore$],[$Income Statement$],[$For Quarter Ended March $31]]],[$Sales$,,$$ $910,000],[$Cost of goods sold,,$565,000],[$Selling and administr,,$345,000],[\backslash$table$[[$Selling and administr$],[$Selling$]],,],[$Administrative$,$$ $120,000,],[,144,000,264,000],[$Net operating income,,$ $81,000]]$

The contribution margin for Sam's Bookstore for the first quarter is:

Multiple Choice

$$280,000$

$$666,400$

$$243,600$

$$808,600$