The boy have to wear 4 from one of each to school.
They are only asking for how many he sells so the ones he gives away don't mean anything.
24-10=14
Sells 14 roses a day
36-12=24
Sells 24 carnations a day
X= number of roses and carnations sold in a week(7 days)
X= 24(7) + 14(7)
X= 168 + 98
X= 266
Dan sells a total of 266 roses and carnations a week.