Ann has a favorite number. it has a digit less than 4 in the tens place. it has a digit greater than 6 in the ones place. could the number below ann number

The only numbers that could be Ann's favorite are
39
38
37
29
28
27
19
18
17

On monday,mrs.wise bought 3 lbs of apples at $4per lb= 4*3=$12on tuesday ,20%off and she buy 5 lbs of apples = $4-20%=3.20*5lb=$16example: other wise when she buy 5lbs on monday she have to spend 4*5=20