Charges to deliver a package to a Bob's office are 65 cents for the first 250 grams and 10 cents for each additional 100 grams or part thereof. If the delivery cost was $1.55 how heavy was the package in grams?
A. 259
B. 950
C. 1040
D. 1145
E. 1155
The weight will be 250g plus (1.55 - 0.65)/0.10 units of 100g
250 + 900 = 1150
This is the maximum weight that can be sent at that price. But, weights exceeding
250 + 800 will also get charged this amount (that is what the ‘part thereof’ implies).
Hence a package weighing 1145 will be charged $1.55.