Final answer:
Grace paid 136k for the message
Step-by-step explanation:
To calculate how much Grace paid for the message, we need to find the total number of extra words, since she already paid for the first 12 words. There are 60 words in total, so the extra words would be 60 - 12 = 48 words. Since Grace pays 2k for each extra word, the total amount she paid for the extra words would be 48 * 2k = 96k.
Adding the initial payment for the first 12 words (40k), the total amount Grace paid is 40k + 96k = 136k. Therefore, Grace paid 136k for the message.