I'm assuming she gets 2% commission on sales and that she gets paid monthly from her yearly salary.
If the above is true, her monthly pay is calculated as follows:
Commission: 48500 * 0.02 = $970
Monthly salary: 30000 ÷ 12 = $2500
So monthly pay is $2500 + $970 = $3470
Table b
explanation: there’s a pattern
6 times 8=48/2=24 cm squared
You divide by two because there are two triangles in a square.