Susan struggled to figure out the hat sales for last week. Someone left off the key, she knows it must be Sumwhere! Help her fill in the data she still needs

Just tell me how to set up the equation.

Acabinmaker buys 3.5 liters of oat varnish the varnish cost $4.95 per liter what is the total cost of 3.5 liters

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.