Pierson o ne a na le dintlha di le 278 mo motshamong o le mongwe wa bowling. Nikita o ne a na le dintlha di feta tsa ga Pierson ka 11 go tswa go halofo ya dintlha tsa ga Pierson.  Ba ne ba na le dintlha di le kae ka bobedi Pierson le Nikita?

When Billy was first hired, he was paid at a rate of $10 per hour.  After 2 months, he was given a raise of $0.50 per hour.  On his first anniversary at work, he was given a raise of $1.00 per hour.  Sally just started working at a different business, and her starting salary is $0.50 more per hour than Billy's starting salary was.  If both Billy and Sally work 20 hours, how much more money will Billy earn than Sally, in dollars?
Pierson = <<278=278>>278 dintlha 
Nikita = (1/2) 278 + 11 = 150 dintlha
278 + 150 = <<278+150=428>>428 dintlha
Ka bobedi, Pierson le Nikita ba ne ba na le dintlha di le 428.
#### 428 

Billy has a salary of $10+0.50+$1.00=$<<10+0.5+1=11.50>>11.50 per hour.
Sally is paid $0.50 more per hour than Billy's initial salary, for a total of $10+$0.50=$<<10+0.5=10.50>>10.50 per hour.
If Billy works 20 hours, he will be paid 20*$11.50=$<<20*11.5=230>>230
If Sally works 20 hours, she will be paid 20*$10.50=$<<20*10.50=210>>210.
Thus, if both work 20 hours, Billy will be paid $230-$210=$20 more.
#### 20