Pierre's freight forwarding company charges $20 for plates delivered on time and $17 for plates delivered late. In the month of February, Pierre's freight forwarding company collected $4176. For every 18 plates delivered, 14 were delivered on time and 4 were delivered late.

1. What was the total number of plates delivered late?
2. How much less money did Pierre's freight forwarding company collect in February due to the late deliveries of the plates?

	On time	Late	Total
Number	14 u	4 u
Value	20	17
Total Value	280 u	68 u	348 u

(a)
Total amount collected in February
= 280 u + 68 u
= 348 u

348 u = 4176

1 u = 4176 ÷ 348 = 12

Total number of plates delivered late
= 4 u
= 4 x 12
= 48

(b)
Amount that Pierre's freight forwarding company collected less from each late delivery of plates
= 20 - 17
= $3

Number of plates delivered late
= 4 u 
= 4 x 12
= 48

Amount that Pierre's freight forwarding company collected less from all the late deliveries of plates 
= 48 x 3
= $144

Answer(s): (a) 48; (b) $144