When someone woke up in the morning the temperature was 4 degrees above zero. Would it be positive/negative?

Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. she also earns a base salary of $750 per week. what were her sales last week if her total earnings for the week were $1,076.25?

Me i’m stuck on all these questions besides the two bottom ones

Can someone me and explain..will award brainlest!