dline call tariffs are fai , to whom the call is placed, and whether the receiver has a landline or cellphone. following is an example of Telkom landline tariffs: osts of a directly dialled call from a Telkom to a Telkom landline are determined by me destination and the time of the call, as outlined below: The destination: Different tariffs exist for local, long distance or international calls: ocal calls: The minimum charge is 65 cents, which covers the first 90 s, after which call is charged at 0,72 c per second. During CallMore time, the minimum charge 65 c covers the first 189 s after which the call is charged at 0,34 c per second. ong-distance calls: The minimum charge is 65 c for the first minute, after which call is charged at 1,08 cents per second. During CallMore the minimum charge f 65 cents covers the first 2 minutes after which the call is charged at 0.54 c per econd. The time of day: Standard time: Mondays to Fridays: 07:00 to 19:00. CallMore time: Mondays to Fridays: 19:00 to 07:00, and Fridays 19:00 to Mondays 07:00 ll rates are VAT exclusive. Costs from Telkom landlines to cellphones are not based on distance. Calls to ellphones are charged in increments of one minute for the first minute and in crements of 30 s or part thereof thereafter. tandard time: Mondays to Fridays from 07:00 to 20:00: Calls to cellphones are charged at: R1,29 (R1,48 VAT included) allMore time: Mondays to Fridays from 20:00 to 07:00 and Fridays from 20:00 to ondays 07:00 Calls to cellphones are charged at: R1,03 (R1,17 VAT included) EXERCISE 19 Use the Telkom tariffs on page 41 to answer the following questions: 1 2 3 4 5 6 7 What does a long-distance landline-to-landline call from 20:00 to 20:20 cost on a Sunday evening? Set up equations to calculate the cost of a local call from a landline to a landline during CallMore time. Draw a graph to represent the different tariff structures for landline-to-cellphon calls made during standard time and CallMore time. How much money will it cost to make a local landline-to-landline call lasting 3 min 42 s during CallMore time? John makes a long-distance call to his mother every Sunday evening from his landline to her landline. His calls usually last for about 10 minutes. When he is out of town, his mother calls him on his cellphone on Sunday evenings. Calculate the cost of the respective calls. How much more does John's mother have to pay for the 10-minute call (excluding VAT), she makes to her son whe he is out of town? Pamela has an Allo-Allo prepaid per-minute price plan. What would she pay a 5 min 23 s call to an M-Tel cellphone 6.1 6.2 made in peak time with standard billing made in off-peak time with standard billing? Consider the peak rates on an Allo-Allo prepaid standard price plan and a prepaid per-second billing plan for only Allo-to -Allo calls. 7.1 Draw a graph to show the difference between the two. Use a scale of 7 min ​