Ahardware store pays $3,500 for 42 lawnmowers. then the store sells the lawnmowers for $99 each. how much profit does the store make from the lawnmower sales?

i think the equation is 99×42, and then you subtract that number from $3,500.
tell me if i am right, if i am wrong, tell me how to do it.

I believe you have done it incorrectly. What you need to do is:
Step 1:
3,500 divided by 42 and you get 83
Step 2:
Take $99 and subtract 83 and you should get $16
Step 3:
Now take the $16 profit per lawn mower and times it by 42 and you should get something around $642 in profit.

I may be wrong but i tried

It is 198,87032,750 + 375 = 33145 so, we take the 6% and we make it a decimal (0.6) and multiply that, then that is your answer