Answer:
 The weekly gross pay is $1501.84 .
Explanation:
As given
Martha earns a weekly salary of $1428 plus 4% commission.
 Last week, she sold $1846 worth of products. 
4% is written in the decimal form 

= 0.04 
Commission Price = 0.04 × Worth of the products sold last week 
Putting values in the above
Commission Price = 0.04 × $1846 
 = $73.84 
Weekly gross pay of the Martha = Weekly salary + Commission Price .
 = $1428 + $73.84 
 = $ 1501.84 
Therefore the weekly gross pay is $1501.84 .