Predict the following regression curve and forecast ,calculate the period if any (with power bi)

Google Adwords - Monthly Statistics Device: Select values to display: Campaigns Cost Total Cost: 4,545 6,046 6,307 6,638 4,116 7,954 9,987 8,527 8,309 8,026 10,720 8,135 Month: Apr/2021 Mar/2021 Feb/2021 Jan/2021 Dec/2020 Nov/2020 Oct/2020 Sep/2020 Aug/2020 Jul/2020 Jun/2020 May/2020 Campaign Name Period1 Period2 Period3 Period4 Period5 Periods Period7 Period8 Period? Period10 Period11 Period12 Campaign 1 788 1,095 945 1,177 582 1,443 2,558 1,916 1,868 1,874 1,769 1,145 Campaign 2. 1,522 1,650 1,457 1,115 651 1,600 1,720 1,409 1,959 1,421 2,268 1,821 Campaign 3 210 232 110 309 263 420 272 406 415 478 444 311 Campaign 4 428 1 ,170 1,284 1,619 1,037 1,657 2,072 1,870 1,464 1,571 1,536 745 Campaign 5 1,598 1,899 2,511 2,419 1,583 2,834 3,365 2,926 2,603 2,682 4,702 4,114